I guess this would be the forum to post this. I am looking for >constructive criticism< on my setup, any tips, tricks, hints, or suggestions are pretty much welcome.

Here is my current setup:
deck: Clarion 5575 pro audio (empeg hopefully soon)
primary amp: PPI PC4200
going to:
front dash speakers: MB Quart RKB100 (4")
rear deck speakers: Kicker i690 (6"x9")
line out on 4200 (90hz low pass) to
secondary amp: PPI 2200
sub: Kicker 10" CompVR in ~.75-~1 cf sealed enclosure.
(Sub and amp are not installed... yet)

Any comments/suggestions on hardware?

I listen to primarily rock and metal with a little lighter stuff thrown in.

Would there be any benefit in getting a crossover? (my theory is that one would allow me to 'tune' the freq. range better for each speaker set so I don't have any 'gaps'). Or is should I just use the adjustment on the amp?

Thanks

Jake