I've done some of the "typical" stuff....but went a slightly different route.
my car is black with a dark charcoal int....so I did the panels in gloss black....it makes the interior pop...but it's still subtle
swapped most of the knobs for billet...and went for Autometer Lunar gauges...full cluster....FP and boost on the pillar...and when we did the custom audio, we put in oil-pressure and voltmeter in the slot where the CD player was
did a little 2 tone on the Corbeaus before bolting them in too....dark charcoal down the middle to match the back seat....and black on the bolsters and backs
had the trunk done in an effort to flow with the interior when we loaded it up with subs and amps....everthing wrapped in black leather with interior grade carpet on the floor....matching the lid cover with the running pony....tossed the spare and put a hatch in so I can store detail supplies where the spare was
with regard to hold the pillar pod with 2-sided tape...been there....it holds for a season...then you hit a bump, and the mofo comes down on your head
last fall I swapped for one of these
http://www.speedofsoundllc.com/ may seem a bit pricey at first...but it comes painted...and snaps right in like the stocker...it's a great piece