I'm confused

I like to spend time on Audiogon to educate myself. However, the more I educate myself, the more confuse I get. That shows how novel I am.

Here is my case. I have 7 power-hungry speakers with handling power from 50-250watt. Due to small room size (12'X13'), my current HT set up 5.1 Thinking 90wpc is sufficient, I received a free used Denon 2802 as a gift. My AVR got clip once when I was watching Tears From the Sun too loud. I learned that b/c 90wpc was not continuously power driven, the true wpc could get reduced substantially. So here are my options below.

1) Get 7-channel amp (100 - 200wpc) to go w/ current Denon AVR. Cons: some body said that I am better off saving my $ by using the amp from current AVR since multichannel amp is not any better. Is this true?

2) Use my current AVR or upgrade to better, more powerful one since multi-channel does not add much value to the quality of sound compared to the amount of money added. Cons: Sound quality?

3) Get 2-channel amp to drive main speakers during stereo mode. Get additional 3-channel amp to drive center and side rear speakers. In the future, get additional 2 channel to complete the 7.1 setup. Cons: really limited space, really excessive generated heat, and really expensive.

4) Go separate like the Outlaw combo -- 7X200wpc amp and a separate preamp/processor for ~ $2400. Cons: entry preamp/processor won't make a difference compared to other higher-end preamp/proc? Moreover, I can get a better quality pre-own combo for less amount of money, and if so DOES THE WPC ON PREAMP/PROC HAVE TO MATCH W/ WPC ON MULTI-CHANNEL AMP?

Even though the info provided is very limited, if you were me, which option would you pick and explain why you pick such option or eliminate others. I'm new to this, so I'm all ears. Each response got my full, undivided attention.