The KS 300.4 will do 175wrms x 4 at 2ohm. you can buy them used for a lot cheaper & they are very reliable amps... I see that you already PM'd somebody...
Be sure to read a independant review from a professional...
Here:
http://www.arcaudio.com/productpics/ArcReviews/productreviews/archives/PAS-9.10-Arc300.4-testreport.pdf
KS 300.4 DESCRIPTION
Advanced microprocessor control system
Non digital class H switching design
Code based flashing diagnostics
Designed By Robert Zeff
Protection against: Reverse voltage, Over Voltage, Speaker Short, and Thermal Overload
Can drive highly reactive loads
Hi/Low Level balanced switchblade RCA inputs for flexible integration into most applications
Optically isolated Mosfet power supply
Quiet Internal Fan cooling
CROSSOVER Butterworth 55Hz - 5.5KHz Variable 12 dB
FUSE 3 x 30 Amp
POWER OUTPUT RMS @ 4 OHMS 90 x 4 watts
POWER OUTPUT RMS @ 2 OHMS 175 x 4 watts
S/N RATIO 95dB