Recommended 4-channel amp?
 

Here's my setup:

- Pioneer AVIC-D3 deck
- 6.5" Alpine Type-R components up front (SPR-17S)
- Alpine 5.25" Type-R speakers in the rear (SPR-13C)

I am leaning against running a sub, so I want to make sure that my speakers are properly powered. I don't want to spend a lot of money, but I want the speakers to be run to their full potential or close to it for a reasonable price. Not just running off the deck.

To me, a lot of 4 channel amps seem the same or very similar - I'm just looking to max out my setup without going to a sub setup. I'll probably pick something up on eBay or Craigslist in new or lightly used condition. Alpine, JL Audio, etc. preferred.

Suggestions appreciated!

Rockford fosgate, their amps are really good and are under-rated.

Zapco amps. I use DC reference, no processor needed =]