Blacklisted9: I would run 285/35s in front with your 325/30s in back which is closest to stock diameter. That would ensure no handling issues or codes due to differences in stock tire diameter.
There are Nismo owners running 285/35 in front and 325/30 in rear on stock rims with 10mm spacers in front and no spacers in the rear and they are flush with fenders. Nismo wheels are the same widths as yours but offset is +40 (now +30 with spacers above) in front and +23 in rear. Use the link below to check offsets,spacers, tire size, wheel width, etc. vs your stock wheel and tire setup to make sure before you buy!
Custom rims, wheel tire packages for your ride - RIMSnTIRES.com