I'm a complete 'tard where car audio is concerned so I'm hoping y'all can recommend an amp that will drive four new BA Pro60s I found on e-bay.

The Pro60 specs are:

-6-1/2" component speaker system
-power range: 2-125 watts RMS (150 watts peak power)
-frequency response 50-22,000 Hz
-sensitivity: 90 dB

I'm a big fan of BA sound and quality, and had considered one or two BA GT-40 amps (also on e-bay) to drive the components. Vital stats:

-Multi-Ch. Power @ 4-ohm (12.6VDC) 4x45W
-Multi-Ch. Power @ 2-ohm (12.6VDC) 4x70W
-Dual-Mono Power @ 4-ohm(12.6VDC) 2x140W
-Dual-Mono Power @ 2-ohm (12.6VDC) 2x175W
-Mixed Op. Power @ 4-ohm, 2ohm (12.6VDC) 2x45W, 1x190W
-Mixed Op. Power @ 4-ohm, 2ohm (14.4VDC) 2x55W, 1x240W
-Frequency Response (-3dB) 10Hz-95kHz

The amps are big(ish); about 15" long and 9" deep and space is a concern in the roadster. One would fit easily; two might be a bit snug. So I'm curious to know if A. these amps will make the most of the speakers, and B. are there any comparable amps that have a smaller form factor?

Thanks!