Help sought on adding Sep. Amp(s) to my HT Setup.

[SUNSURVEYOR]

Having recently completed my first HT Set up, I'm wanting to upgrade to more power. Question is am I better off buying a larger (More powerful) Reciever/ Or adding an amp(s) to the present reciever?
My Set Up;
Reciever; MARANTZ SR 5004 7.1 (90 Watts)
Fronts L&R; B&W CDM 7 SE
Center; B&W CDM CNT
Wides & Rears; POLK RX 80i in ceiling.
Sub; PSA XV15

I ran across a pair of NAD C 272 AMPS, 2 CH @ 150 watts or bridgeable to 300 Watts X 1 Ch.
Is this the way to go by using one or both on the CDM 7 SE Towers? Would 2 of these AMPS (300 watts ea.) be too much for my B&W's?
I can get the pr of NAD Amps for 600. This seems to be a more cost effective way to go as opposed to buying a larger AV Reciever (Marantz SR 7007). my thinking is that the 90 watt rating on my 5004 is sufficient to drive the surrounds. What of my center?
Will feeding 150 or 300 to the front towers work OK with the center hooked up to the 5004 (90 watts). Really venturing on uncharted landscape (for me). Anyt help advice would be appreciated.

 

[BoredSysAdmin]

why do you feel that you need more power? Not sufficient volume right now? Your B&M are fairly easy to drive with 90db efficiency and 8ohm nominal with 4 ohm minimal
see this thread:
http://forums.audioholics.com/forums/amps-pre-pros-receivers/89201-how-much-power-do-you-need.html

 

[TheHills44060]

I like those CDM 7's. Whether you actually need more power is your call but having it on hand is nice feeling. If the Marantz has all the features you need i wouldn't bother upgrading it just for powers sake, i think the Nad's are the better choice. Should you ever decide to change your speakers to more inefficient designs the amps will give you more flexibility with your selection.

 

[BoredSysAdmin]

I like those CDM 7's. Whether you actually need more power is your call but having it on hand is nice feeling. If the Marantz has all the features you need i wouldn't bother upgrading it just for powers sake, i think the Nad's are the better choice. Should you ever decide to change your speakers to more inefficient designs the amps will give you more flexibility with your selection.

My point is - if OP has money to waste - I'd rather he would send it my way, but if you wants to improve sound he needs to invest in speakers first

 

[TheHills44060]

My point is - if OP has money to waste - I'd rather he would send it my way, but if you wants to improve sound he needs to invest in speakers first

I hear ya Bored. Speakers make or break a system without a doubt. I think most people outside of the hobby probably think we are wasting our money but hell that's half the fun. SUNSURVEYOR didn't articulate exactly why he/she felt the need for outboard amplification but I'm not going to stifle experimentation. First hand experience is far better than any advice I can give. If they were crap amps then I'd recommend against it but the Nad's are capable.

 

[2ndammendment]

Remember that getting an amp that has double the wattage will only get you a whopping 3dB more output. Thats noticeable but not a large increase in volume by any means. Sound quality will not improve at moderate listening levels unless your maxing out your current amp. Most AVR's are capable of insane SPL's in average sized rooms. I had a 7.2 system in a 25ftx20ft room with speakers that didn't have a very high sensitivity. Even then I felt I had more than enough volume. I usually had my receiver at -5dB to -10dB. I was using maybe 1/4 of the total juice my receiver could dish out.