How to add to my 2-chanl int. amp for home theater


I have a good two-channel integrated amp I use for music. I'd like to move to home theater inexpensively, that is without replacing my entire system. How can I add to what I have to get surround sound processing and amplification for the other channels? Ideally, I'd like a surround sound receiver that has line-level outs for the front right and left channels, so I can use my integrated amp. for those, and use the receiver for the other channels. Unfortunately, I haven't been able to find one that has them. The closest is receivers that have pre-amp outs. But that would bypass the preamp stage of my integrated amp. even for music, and an inexpensive surround receiver won't have as good a preamp as my integrated amp. I'd like to spend $500 or less but will consider more expensive solutions.
ddoneff
A company named Vantas used to make exactly what you are looking for (if dolby digital and prologic is all you need + amps for center and rears), but unfortuantely went belly up. Their stuff was really high end at the time (1998-2000), and is occasionally here on Audiogon or eBay for about $200-300. Check it out. http://www.audioreview.com/A-V+Preamplifier/Vantas/PRD_118434_2719crx.aspx
Elevick is correct! Adding a good receiver that has pre-amp outs is the most cost effective and easiest way to do this. He is also correct that you actually DO want to use the pre-amp in the receiver, not the integrated amp, when using HT. This will allow all channels of volume control to be performed by the reciever (which is the processor for HT).

Adding an HT reciever to power the center and surround, control subwoofer LFE signal and process the digital signal is GREAT because when you listen to music using the integrated, the receiver is not even in the chain. It can be turned off completely so you know it is not "mucking up" you 2-channel music system.

You can easily buy a good HT receiver with pre-outs for $500. If you go used, you can even get an EXCELLENT 5.1 channel HT receiver.

Personally, I like the Sony STR-DB "bridge line" receivers for less than $500, or the Sony STR-ES line for a little more. They are very easy to use compared to some of the Denon, Pioneer and Panasonic receivers that I have also owned. For a killer HT receiver, the B&K AVR-202 can be had for about $750 used. However, I prefer the easy ergonomics of the Sony.

Enjoy,

TIC
I appreciate the suggestion of using the pre-amp outs on an HT receiver for the front channels. Unfortunately, using the pre-amp inputs on my integrated amp will bypass the integrated amp for HT AND for music. Since a receiver won't have as good a preamp as my integrated amp, the sound quality will by compromised. It's not possible to connect the HT receiver's pre-amp outs to a line-level input on my integrated amp, is it?
"It's not possible to connect the HT receiver's pre-amp outs to a line-level input on my integrated amp, is it?"
Sure is, and this is what is being suggested above. Once you have it hooked up, set your integrated's volume to an easy to remember volume, I use 12 oclock. Now calibrate your HT reciever/processor's levels. Whenever you watch a movie, set your integrated to the same position, and it will be balanced where you set it earlier. Works great.
Re: connecting pre-amp outs to line ins: This won't hurt the amp? Pre-amp outs are higher level than line outs.