Upgrade to double cab

Thinking of trading in my 2006 TRD offroad access cab for a double cab.
I cant decide between another TRD offroad or the SR package.
I like the looks of the SR package with the black rims, smoked headlights, and color matched grille and bumper (I really dislike chrome) I'm unsure about the skinnier tires (do they have more offset or do they sit sunk in like the steel wheels?) I like the piece of mind of having the locking rear diff and being less likely to get stuck, although I have never used it (I've never really taken it off road other than gravel or hard packed flat dirt) Finally comfort, I like the TRD seats are the regular ones any less comfortable, and are the regular shocks really any worse than the bilstein ones?
If I get another TRD offroad I would have to make cosmetic changes to be happy with it, if I get the SR I could be happy with the looks right off, but would I actually be happy with the truck?