I would say definitely paint the stock rims with the $3 paint cans from bunnings if want.
Don't pay big $$$ to get it powder coated. Then u might aswell get bigger better rims.
If u are concerned about ur car looking good with painted stockies.
If the car is neat, has a good paint job and has a kit, the painted stock wheels will look awesome.
But if ur car is too stock, and a lil piggy, painting the wheels will make it look boonga.
The R34'spull of the painted rim look cos they are modern. If ur car is a R32 then painted stockies will look like 14" hub caps spec steel wheels with very high profile tyres. YUCK
My 2c