A little wheel help...

[PatrickJohnson]

So, I want to buy new wheels soon. I would like to maybe get 17's as opposed to the stock 15's on my 08 LB. However, I want my total wheel radius with tires mounted to be the same as stock I believe having different total tire radius would throw off my speedometer (if only a microscopic amount). My problem is I don't know the first thing about wheels and tires. I don't know what offset, lug spacing, etc. i should be looking for. I don't want the tires to rub at all, and I have no desire to lower or anything like that. So, any help someone could give as to the following questions would be greatly appreciated:

What are the specs I need to know on the stock tire/wheel combo to match in a new wheel and tire combo?

What other wheels have you guys used that were maybe stock on another car that looked good (my eye is on the toyota scion xd black trd alloy wheels here: http://conicelliscion.oemdealer.com/...2067_22307.php

if i wanted a wider tire, how wide could i go without rubbing at full turn?

thanks in advance...