I have a set of MRR HR6 20x9 ET 38 on front and 20x10,5 ET 25 on the rears. The rears stick out a bit but once lowered it will be flush with the fender. Fronts need a 10 mm spacer to be even.
You can see them here: ///7670&page=2
I would personally choose a staggered setup or at least same rim size but different offset (or running 15 mm spacer in the back; i had this winter 20 mm spacers on the rear with the OEM 18's and it was a bit much).
Tire width is also important not only the offset. What size are you looking for? 20's, 22's?