Not sure if I should do this or not. I have a 2006 GMC Sierra crew cab. I was going to replace the internals with CDT components and 6.5 coaxes in the rear. Turns out the rears won't fit due to height using an adapter. So back to the drawing board. I was looking at Hertz Dieci series DCX 165.3 for the rear, one up from entry level, and the Cento CPK 165, two up from entry level. I've never had any experience with the Cento line, I only have the DIECI line in my daughters' Toyota 4runner running off the HU for now which will be amped in June. They sound pretty good for what they are, clean-not a whole lot of punch, but good clarity. I didn't know if mixing models makes things odd in the cabin because they're not of the same design level and will perform differently. I do like rear fill to add to the experience; I have learned though that front stage is significantly more important. I am thinking this because there's no significant reason I can think of to invest the extra $75 or so for the rear when I don't think I'm getting the return on the investment. Does anyone have experience with these Cento's? Do they have good midbass, are the tweeters sharp or lacking?