For my civic I did the following:
Pioneer 8400 HU - $350
Rockford Power 360.2 Amp - $245
Infinity Perfect 12.1 Sub - $170
Infinity Components (605cs) - $ 120
Rockford Punch 160.2 Amp - $140
This came out ot $1025 and all prices include shipping. It sounds great and I get many compliments...