KMD,
I went with American Racing Salt Flats painted to order - 18x8 and 20x8. Fronts have a 4.5" backspace. Rears are 4.25". If I wanted to modify exhaust I could have gone a little wider in rear but I used a Waldron's stock exhaust.
Tires are 245/40/18 and 275/30/20. Rears have a little more wrap to them so look a little wider than fronts. I do have a light rub up front if I crank wheel all the way, which rarely happens.