I went with aftermarket 17" Dick Cepek cast alloys. Forged was too much $$$. They went on perfectly. Your choice depends a lot on what you plan to do with your truck. 17" wheels will be a "little" more responsive with the reduced side wall flex. Just don't mistake it for increased traction. Lower profile wheel and tire combos have a crisper/snappier feel, but don't improve the vehicles ability to corner. Instead of a sidewall "rolling", low profiles tend to skip in a corner. A lower profile setup will be good for towing, just for stability. You want a higher profile for Drag racing and off road, so you can air them down to get increased traction. The rule-of-thumb for off road is, the wheel can be no more than 50% of the overall tire hight. So if you run a 17" wheel, you would need at least a 34" tire. For most here, towing is the primary concern. Just check you tire availability, including weight ratings.
Hope this helps. Good luck.