3.5s and 4x10s are the worst speakers you can possible imagine, do not waste your time. the q logic kick panels are worth buying and using 5.25 or some 6 inch speakers will fit also. 6.5s will NOT fit, trust me, i spent 325 bucks on a set of diamond d6 componenets that were open box with no returns, got home and guess what didnt fit?!?!? then i tried 6.5" eclipses, still no fit. i ended up with 5.25" eclipses now. they sound great! 3.5s are alright for highs only, no mid and i would run bass blockers or a crossover on them. i wouldnt waste my time with rear speakers unless you can find a way to fir them behind the rear side windows