Okay....so I want to get new rims and wheels on my new Super White '08 xB. But... I don't know much about them.

Here's what I do know: I don't want to pay the $2000+ on the TRD rims and tires package, that's for sure.

Now what I don't know: EVERYTHING ELSE!

Here are some Questions I had:

1. SIZE: What rims should I be looking for? Will a 18x7.5 size work? How about a 17x7? Any 19" sizes out there that work?

2. OFFSET: I don't know what this means. What works for sure in the '08 xB's?

3. BACKSIDE: I don't know what this means either. What should I look for?

4. DEALERS: Any good, reputable, and cheap dealers in the SOCAL area people know about?

With so many different sizes out there, it's really hard to order.
If anyone with more knowledge and experience can recommend some rims and help out a newb, that would be much appreciated.

Thanks!