I have 18% tint, excellent quality, easy to see at night compared to cheap stuff, and dark during the day. No it's not legal, but you can be defected for something that is legal, so just go dark first off.
I have a 3.5" sureflo exhaust, sounds deep and throaty on the SS IMO compared to the old popular twin 2.5".
yeah ill look into the tint more as far as priceing goes...
as for sound i want it to sound like a tough 6 no lumpyness just pure roar would i have to get stuff like extractors 21/2 inch pipe and hi flow cat??
Generally prices around my area for a sedan range from about #275-$350. 35% is the darkest legal but if I were you I'd go no more than 20%. 5% would be my preference.
As for exhaust, there's a thread in the V6 development section devoted to this and has heaps of vids to give you an idea of what different set ups will be worth. Generally people tend to go with a singe 2.5" exhaust with either a hotdog or resi in the rear to give it a good note. Popular brands for V6's include redback and lukey. Expect to pay from $180-$350.