I think your install looks great. Very nice work. But I'm a firm believer in that more speakers doesn't mean better sound. I'm not saying it can't sound good, its just that a lot of people seem to think more speakers automatically means better sound. They guy who got 2nd place in the meca sql pro league only had a 2 way setup up front and a 10"sub in the trunk. More speakers just makes it harder to tune imo. I think 3-way is as far as i'd go. But it looks like you put a lot of work into your install, so I'm gonna assume you took the time to tune it properly.
I can't get over the way it looks, though. Looks very nice.

What processor did you use? ...if you don't mind me asking