Specially made TT2s for $1500????
First of all.....you want a maximum of 4.75" of backspacing. You can run a 16 or 17" rim with that backspacing. You can buy these wheels....OFF THE SHELF for less than a grand. I think the Chrome ones are less than a grand. If you want to run a late model rim, you can order a spacer from ebay ($140 for a set of 4) that will allow you to run these wheels with no problems.
As for tires sizes. You can go up to 245/45/17s in the rear and about 235/45/17s in the front. I run 245/45/17 in the rear and 225/50/17s in the front. I do have my rear fenderlip rolled, but I dont thinkthe rims would have rubbed if I hadnt rolled. If you want to play it really safe, you can run 235s in the rear and 225s in the front.
I hope this helps. View Dodgestang profile on here or see some of his posts. He has put together an elaborate wheel and tire chart.