Keep it looking standard..
you'll need 2 x 6x4 JBL GTO (in my opinion, the best for the case)
2 x JBL GTO 3.5" for the dash (again, excellent for the cash and sound great)
And finally, you'll want a sub/amp. If you're not that adept at audio wiring, then I'd go for an Active sub.
If you want any help with fitting, PM me and I'll try my best to guide you through what to do.