I did like the look of the stock SRT6 rims, but hated cleaning them and at the track or even daily, I like to see what's going on with my rotors and pads. I can do that with the rims I have.

I don't know that you will be able to get aftermarket rims without using spacers. It probably depends upon what wheels you decide upon and if they have the proper offset.

Here's the information for the OEM wheels...

front:
Dimension: 18" x 7.5"
Bolt Pattern: 5 x 112
Offset: ET 35
Tire Size: 225/40/18
Center Bore: 66.5

rear:
Dimension: 19" x 9"
Bolt Pattern: 5 x 112
Offset: ET 22
Tire Size: 255/35/19
Center Bore: 66.5

Good luck!