hi, I think the black wheel with a polished rim look cool on any colour car, and as you said on your black car they will give it the stealth look but as the others have said they will appear to look smaller due to dished style. :D :D
hi hornet, good luck looking for your lex is.as marx said the is has a 6cyl engine not 4 like the rav.if you want an auto it has to be an is200se as the sport only came in a manual gearbox.if you want more power you could try an is300. :D
black if you like to keep cleaning your car.
silver a bit common.
st lucia pearl a bit different.
try red but your choice at end of the day.
good luck :D