go with the g2 Caliper paint. I did mine and its easy. Some window tint and tint the tail lights with vht nightshade. As far as performance there is crab intakes with are nice and also gtr exhaust systems. I have those too and love them both. Hope this helps
Pontac G6 Sedan 3.5L
Exterior- 8000k HIDS lows, 8000k HIDs fog lights, 20% window tint, Tinted taillights, painted grilles (top and bottom) to match, Custom painted engine cover and battery box, Red painted calipers.
Performance- Crab Intake, Racing Line Performance strut tower brace, GT-R Custom Magnaflow exhaust.
Interior- red LED's on inside, custom painted interior trim to match outside, Memphis sub and Amp, Custom fiberglass sub enclosure.