My entry level budget system......... Any recommendations ?

I'm the owner of a 2003 Chevy Avalanche. I have done hours and hours of research on the web, so that I could get the most out of my budget. This is the system that I have put together. Tell me what you think..........

Front Speaker

JBL MS62C 6.5

•RMS Power Range: 80 Watts

•Peak Power Handling: 180 Watts

Rear Fill Speakers

JBL P652

•RMS Power Range: 75 Watts

•Peak Power Handling: 250 Watts

4 Channel Amp

Soundstream REF4.760

760W RMS 4-Channel Class A/B Reference Series Power Amplifier

125 X 4 @ 4-Ohms

10' Subwoofer

Sundown Audio 10" SD-2 10D2 Dual 2-Ohm Subwoofer

500rms @ 2-Ohms

Mono Amp

Hifonics 1500W Class D MonoBlock HF Series Car Subwoofer Amplifier (HFi 1500)

750rms @ 2-Ohms

I would like some of you guys opinion on this system and if there is anything you would change let me know.