id sae 19's chrome or machined silver... 20's will cause rubbing and will require ur guards to be rolled,
lower it. monaro headlights, 2.5" exhaust, diff air filter, sparkies and sparkie leads. get some coulsen seats (the leather ones are really expensive). do up a nice and subtle boot install say... oh i dunno... maybe two 15" subs surrounded by 4 amps sum 6 x 9s for good measure, 2 sets of 6 " splits in the doors... or u can do wot ive done and do a 3 way (two 6"s and a split each)(that will take care of your doors) dvd headunit and maybe sum screens in the head rest. maybe drop a few neons round after you get new rims(so they reflect ) but this is just me anyway (skyies the limit)