Anyone know of a reputable car audio store that I can get the following components installed in my car for a reasonable price?

I'm replacing the factory in-dash CD player w/ an Alpine HU.
I already have the 2 subs, the sub box, and amp that also need to be installed and wired up. I'm keeping the factory speakers in for now. The subs haven't been drilled in the box yet.

I've got an estimate around $160 to install everything, just curious if anyone knows where I can get this installed at a cheaper price or if this is already a decent price. So all in all, a head unit, amp, subs and box need installation. Thanks

Rich