Building audio system, need opinions on this setup

Hey guys,

I'm slowly building my audio system and doing hours of research on everything before I buy. I have pieced together what I think would be a decent system, but I need some opinions on what I've chosen so far. I am on a budget, so any suggestions are appreciated.Thanks!

Headunit - Kenwood X595 ($170)
Speakers - Infiniti 6030cs front speakers ($200)
Amp (for speakers only) - Alpine F-300 ($165)
Sub - RF 12" P3 slim in a custom box ($160)
Sub amp - Still deciding on a mono
Rear speakers will be added down the road.

Any recommendations/suggestions?