you're fine... I'm happy to help...
yeah looks like what your looking for is the last thing I'd buy... why would you want a 2wd xterra? not trying to insult your taste or anything... just wondering... if you only want 2wd... why not get something that gets a bit better gas milage? a CRV or a Rav4 would probably be better as far as MPG... but they're smaller.
as far as the nooks and cranny's... there's plenty... nissan does kinda like adding in little compartments here and there... pretty cool... though I don't have a ash tray and that sucks... I use them to gather change...
I haven't had any issues with any electronics... though I'd be highly pissed off if I did... I hit 53000 miles on this trip... and it's an 06 so no way should I be having issues...
sleeping in the back wouldn't be too bad... if your under 6'... and have a nice pad... when the seats are laid down they slope to the rear so it's not totally flat... and it's all plastic and hard.
the knobs and switches are nice IMO... they're built to be easy to use with gloves on... they work... that's all I care about
the roof rack is nice... haven't used it yet... but it's solid...