If I were to get these:

http://www.dazzmotorsports.com/wheels_rac.asp

What offset/width would I need to go with my xB on a 2inch Tein drop?

I would get the CR in 18" or 19".

Or these Niche Rhine

http://www.customwheelsdirect.com/Niche/FWD/Niche_Rhine.htm

Thanks

P.S. what spacers and etc would I need also?

I looked here: http://www.scionlife.com/forums/viewtopic.php?t=348

but it doesn't have information on drops affecting it?

if you're going with the CR and u're getting the 3 peice rim....
i suggest u go with a 18x8 all around with staggered offset.
maybe a 30 in front and 20 in rear.
that will work with a lil rubbing if u wanna go crazy u'll have to roll
the fenders a lot!

18x8 +25 in front and perhaps a 18x9 in rear +25.

Is it going to rub when I turn it ALL the way or during regular driving?

So do your Works rub then? If not, then why not?

they rub only when i hit a big dip/bump
but under normal circumstances its fine..

on top my car is fairly low, if u are just on springs, u'll be fine