Ok I went with the Denon AVR-4400H Receiver and the Crown XLS-2502 Amp to go along with my Cerwin Vega XLS-215. the problem im having is im not getting any where close to having the bass that I should be getting (my fillings should be falling out). And the Crown is humming like no other. Any help would be appreciated.
1) Humming - probably ground loop hum noise. That's probably the #1 problem with using external amps. A lot of people tend to experience ground loop hum. Try using the speakers with just the Denon X4400 without the Crown Amp.
Your Cerwin Vega XLS dual 215 speakers have a sensitivity of 95dB/w/m, which means you most likely don't need any external amps.
https://www.zzounds.com/item--CWVXLS215
We have loud karaoke parties in my 23'L x 22'W x 13'H very open family room.
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I've used just a Denon X3100 AVR with my 93dB/w/m 4-ohm speakers. Absolutely no issues for 8 hours. With dual 120mm fans atop the Denon, it stays extremely cool and rocks the house.
And your speakers are even more sensitive than mine!
2) Bass - this has everything to do with the speakers. The specs say the bass is 36Hz @ -10dB. This could mean 60Hz @ -3dB.
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Using 2,000W amps won't improve the bass of your speakers. You will need to use Subwoofers with these speakers.