My advice, go for either the MB Quart Discus range, or the Focal Access range. All of this kenwood/alpine/pioneer stuff doesnt compare to either one of those ranges, although they may be a bit cheaper (but not always). Whats your budget? Does it take components or coax's front/rear?
MB quart stuff has been more and more difficult to get hold of in the uk recently, although there's some sellers on gaybay. Focal stuff is more widespread, here's a 5.25" coax:
http://caraudiosecurity.com/shop/product/products_id/4578.htmlTrust me, this stuff is miles better than the normal big brand manufacturer stuff. Don't know why people don't use the specialist speaker manufacturers stuff over widespread brands tbh, I mean - something like JVC speakers, why bother when you can have Focal? All the USA car audio mags with SQ competitions in that I read about mostly had cars with Focal Utopia/MB Quart Q series/top end Rainbow speakers powering the front soundstage. Maybe people don't know companies like this exist, or that they do a entry level line.