Sony is not known for high quality amps. I'd look into something from fosgate's old line, the high kenwood line, pioneer premier line, or kicker's line.
It's hard to find a happy medium between price and real power on an amp, but you normally get what you pay for.
I'm running a Pioneer Premier 760 watt amp on two Premier DVC 12's at the moment. They're underpowered, but plenty loud for me and I only spent about 150 on the amp.
"I'm not driving too fast...just flying too low"
-03 SB Cobra vert- 2552 of 5082 Born 02/25/03
90 7up vert - new project-07 DSG Focus -DD