You're worrying too much about the peak power ratings. You will never drive your amplifiers at their peak rated output. By the time you drive them to even 60-70% of the rated peak power, you will hear unacceptable distortion in the sound. Remember, the distortion figures are cleverly specified for a 1 kHz signal at 1 Watt of power. No OEM will tell you what the corresponding figures are at higher power or at different frequencies.
Also, consider a real life situation. Most people listen to music at about 85 dB SPL. Let's assume that your speakers can produce a loudness of 85 dB heard at one metre distance from speaker when fed a one Watt signal. Most people won't be listening at 1m distance. For the sake of our explanation, let's assume most folks are happily enjoying their music sitting 2m away from the speakers. So to achieve the same 85 dB SPL loudness, the amp will have to feed it four times the power needed at 1m. So 4 watts. Now let's say 85 is a bit low so let's double the power to 8 watts. SPL will now be 88 dB. This is the average loudness. Music will have peaks - say as much as +20 dB from average in extreme cases. Even if you add for such peaks, you'll be using just a fraction of the 100 watts of your amplifier.
So short answer: even a (true) 50 Watt amplifier will be more than enough to give you extremely loud music in most listening rooms.
Whatever combination of amplifier-speakers you buy, take care not to drive them to clipping levels.
Do go to as many audio showrooms that you can go and listen, listen and listen to different offerings. That way, you'll be able to sieve the crappy ones from the good ones, and further refine that to the best sounding. All within your budget of course. Take CDs of familiar music, don't depend on CDs that may be available at the showroom - they might not be familiar to you. It's essential to listen to familiar music as that's the only benchmark you have and can carry around in your memory. Listen to how they sound in different setups.
Don't ask the showroom guys for the specs. Listen first. It matters more. You can be sure that they'll not sell you incompatible amp-speakers that will burn out at the first opportunity.
Also, ignore temporarily the prices, as we tend to automatically assume higher priced offerings should sound better. This isn't always borne out in listenings.
Happy hunting
