Home Theater Noob Looking to Upgrade


I have been reading about Home Theater systems, components, upgrading, etc. for days. I had yet to find a good place to really get some good information without it going over my head. I am finally getting pretty well versed in some of the lingo but please bear with me. I want to really up the quality of my home theater, but staying within a reasonable budget.

Background:

As a youngster I wanted a surround sound system so I went out and paid like $300-500 (can't remember) on a all in one 5.1 Panasonic system. Somewhere along the line the electronics of the system failed so I tossed out the subwoofer which powered the system somehow and the receiver where you inserted your dvd's. I kept the center channel, front left and right and rear left and right (all the same speaker).

Recently, back in August or so, I went to my local Best Buy (probably frowned upon but oh well) and picked up a new Samsung LED-LCD-HDTV. I also in the same purchase picked up a new Yamaha RX-V373 and a Polk Audio PSW110 sub-woofer. I am currently using the satellite speakers from the out of the box system. As you can imagine this is less than satisfactory. It has sufficed for the past few months but it is time to upgrade. I have the system set up in a full basement, not sure the square footage or anything, but decent sized.

As I understand it, my current receiver can power 85 watts per channel into 8 ohms (1 kHz) at 0.9% THD (not all that sure what THD is although I have read a little bit about it). I am ready to upgrade the crappy speakers to match up more with my sub's quality. I have a feeling to get some really nice speakers would be a waste with the receiver only pushing 85 watts per channel. I am assuming I am going to need to buy another amp or something to help drive enough power to each speaker, but I am just not figuring out the best and most reasonable way to go about this. I was thinking I should get a new center channel first....Any suggestions?
golfluvr5000
Thank you, this is some good advice. How about if I am actually interested in a step above "entry level"?
As long as the speakers are 8 Ohm and have a sensitivity of 90 db or higher, your good. The Klipsch Reference your looking at are highly efficient and would work great too. Take at look at the impedence and sensitivity specs of the Klipsch models your looking at and you will see what I mean.
What are you thoughts on the power handling though? I did read something somewhere along the line, cannot quote the source so perhaps unreliable, that stated that under-powering your speakers can actually damage them and that you would prefer over-powering them to not getting them enough. The Rear Surrounds (RS-42 II) have a power handling of 75W RMS/300W Peak. Is this not a concern given you were saying my Yamaha AVR is likely only putting out 45-50WPC?
Just for reference on the power handling of the speakers I am looking at:

RS-42 II x2 = 75W RMS/300W Peak
RB-51 II x2 = 75W RMS/300W Peak
RC-52 II x1 = 125W RMS/500W Peak

How do I need to interpret these numbers with respect to the ability of my AVR in powering these speakers?
Correct, too little power will burn out speakers a lot more than too much. Because all amps will generate more than their stated output of watts but with distortion. Its called driving the amplifier into "clipping" and it is this "clipped" power or distorted power that does the damage. Thats the THD figure you spoke about not being clear on - Total Harmonic Distortion. You want this number, relative to the watts, to be below 1%. So the lower the better.

Don't obsess about speaker power ratings. Its the sensitivity and impedence numbers that matter. The Klipsch are very sensitive at 96 db at 1 watt at 1 meter. This means that it will produce 96 db of sound pressure with only 1 watt at 1 meter away when fed a signal. Most of the time speakers are only operating on a couple of watts. Its only complex musical passages or high action scenes in movies where the speakers require more power to be delivered. And they are not all asking for it at the same time. This is why AVR manufacturers can boast big numbers from small power supplies into 5 or 7 speakers. Your Yamaha probably can deliver 85 wpc but only into ANY ONE SPEAKER at a time. And for brief moments when the speaker demands it. To deliver this amount into 5 speakers SIMULTANEOUSLY and CONTINUOUSLY, it probably falls off to 40-50 wpc. Still plenty to handle a set of Klipsch at 96 db efficiency.

If you like the Klipsch get them and don't worry. Also, after you get them, then consider upgrading your receiver to something with more power and your speakers will be ready. Just don't fall for the AVR marketing hype - look at manufacturers that are more honest with lower wattage ratings with ALL CHANNELS DRIVEN CONTINUOUSLY. This is why upper eschelon companies like NAD, Arcam, Cambridge Audio state far less power but at often 2-3 times the cost of a Yamaha. Its real, real power. Even the higher priced models from the mainstream AVR manufacturers like Yamaha will begin to get more honest at a certain price point. Learn to read the numbers! Hope all this helps - I am now at my personal 3 post limit in a thread LOL.