For a 20x9 with a +38 offset you will need to get a grinder, and cut about 2 iches off your fender. Then go to a Bodyshop and have a nice Wide Fendered Body Kit installed.
You are also going to need a retarded tire size, like a 245/25R20... which NOBODY makes.
Don't take this personal, but spend your money elsewhere. You are going to need to install a big brake kit just to be able to keep the STOCK stopping distance.
For the money involved, you could EASILY buy some Enkei RPF1 Wheels, which are insanely light (I am saving for them), buy some R Compounds, and install a Full Coilover System, and STILL have enough money left over.