Such hard decisions :D Anyone with some insight on Amp Selection?

thanks for the input but ended up getting both to test um back to back, thanks for the input but both of the suggestions end up completely scrapping things i have and ends up being a headache, all i wanted was more power and matched power to my center, believe me i would love to go down the rabbit hole, but i dont have the time nor do i want to spend the 2500 on a receiver, and the bp30's are definitely a hungry beast, from everyone ive talked to they say the more you throw at it (power) the better they sound, and i am extremely happy with the definitive bp-30s, i absolutely love them, and they sound great out of the TX-NR838 in "pure audio" mode, was just curious of the sound differences between the B&K and the adcom. I think something is wrong with the b&k because it sounds so... thin, a lot of the oomph of the speakers is gone with that amp, and its strange that the adcom gfa-5503 seems almost double the weight of the 4430, same power? so strange, but going to run the signal generator through the b&k with a dummy load, and see the sign wave, see if something funny is up, they sounded WAY different, vocals on the 4430 almost blended into the music, whereas the adcom puts vocals straight in your face, and imaging seemed better, soundstage was wider with the 4430 but again i have a funny feeling that somethings up with it, and ill find out soon when i run the tests.

Welcome. Maybe the  best thing is to decide your goals. Is it just power you want? Or do you want good sound with it?

The biggest problem with trying to mix so much equipment together is that you generally end up with a mess. Too many pieces cause too many opportunities for bad results. More power does not necessarily make for better sound. The Deftech speakers are 8 ohm & 91 db efficient. Contrary to what you have heard, these speakers shouldn’t be power hungry. My Silverlines are 93.5 db and I run them with 35wpc no problem. AAMOF, They sound better now with 35 wpc tubes than they did with 250 wpc highly regarded Solid state. Your receiver has 7 channels @ 130 wpc and yet you have 2 outboard amps. Why? Power? What good is power which is unusable/. If you must use 2 outboard amps I’d want 2 of the same. But you are getting a system way out of balance. The preamp had a LOT to do with sound. But If its just power you want, get some Berringer PA amps with 800 wpc. They are usually less expensive. Enjoy

well, just going by specs is a funny thing, since i am very for "empirical" data, however there was a huge different in the sound quality moving from the 130wpc receiver, to just using the receiver as a preamp and going with the gfa-5500, and i am not using multiple outboard amps, i am using one, went to gfa-5500, wanted to power the center channel so wanted a 3 channel to replace the gfa-5500 with a gfa-5503 or the B&k 4300, hence my dilemma, however i solved it by buying both. and i am not going just for watts (not sure where you are interpreting that from) and you say why have watts that are unusable, why are they unusable watts? to be honest, i was asking a simple question as to which amp was better in opinion, not to tell me to replace my entire setup and go with soemthing you would go with lol. I have needs that you are not considering, this is my main living room that is also for movies, i dont want a separate audio rig, literally just deciding on 2 different amps that i saw available that have 3 channels (front cneter right). not sure how we went down this rabbit hole of random suggestions. and you can run your speakers at 35wpc awesome, we probably have different listening habbits, and different room sizes, this room im putting at is 12,000 cubic feet, so more watts is nice, and i like to listen to it loud, and sometimes outside with 30 people over bbqing etc, im sure headphones would suffice at 1/4 watt for some people :)

why have watts that are unusable, why are they unusable watts?

Because, if the first watt isn’t any good, why would you want 200 more of them?

The reality is even when listening quite loud the vast majority of the time you’re using only a very few watts- and only fractions of a watt when its not really loud. Because if you think about it, a 90dB speaker plays pretty loud with 1 just watt (90dB), real loud with 10 (100 dB), and crazy loud with 100 (110dB). Only 100 watts, and so loud its hearing damage.

And yeah, yeah I know: distance. Whatever. Its still loud.

The above by the way is in impotent solid state watts. In manly tube watt terms 30 watts is plenty. In multichannel home theater terms no amount of watts is enough to sound as good as 30 quality tube watts. Its kind of like, you can have a whole army of Ben Stillers, its never gonna amount to one Arnold. Or to misquote another famous actor: All your watt are unusable to us.