looking for 4x6 dash and 6x9 suggestions....

 

I am running Infinity in both locations. Reference series 4x6 plates in the dash and 6x9's in the rear. Sounds excellent, especially since I picked them up from a member here for a killer deal. However, I have and love Infinity's in all my vehicles, and I highly recommend them for stock replacement. They do fit well and provide excellent sound quality.