I hear ya. I still have some decisions to make. I just like the size of a 20" wheel.

 

If you're looking to do some serious offroading, you'll want to get a smaller sized rim than 20". And if you're looking to save some money on wheels/tires, go with 18" rims (cost nearly the same as 17"), and the tires for 18's are cheaper then 17's, or at least the ones I was looking at. However, if you're keeping the truck on pavement then 20's will work fine, especially with 37's.