I'm trying to figure out a good 5 channel amp for cheap? That has enough power for making it semi decently loud but i'm going for SPQ instead of SPL. Thanks. I was thinkinking zapco 6 channel amp but i was wondering if there is anything else out there that is good? I using 4 ohm speakers.

 

Check out the JL Audio 500/5. Good bang for the buck, specs out pretty well, cheaper than Zapco. Has 250W RMS to sub. 100Wx2 to front, but only 25Wx2 in rear (this is where it really falls short). If you're not planning on driving your rear L/R too hard (i.e. rear fill) , might work out for you...also depends on what sub you're using.
Zapco is better, but you're prob gonna pay more for it.