I've had a few combos on my Satellite over the years. With stock wheel-wells, my advice is the following:
Front: 215-70's on 15x7's
Rear: 255-60's on 15x8's with 4-3/4 or 4-1/2 back spacing. This will be tight, but will fit and fill the well.
Slicks: you can fit 28x9's on the same rims in there.