Wheel Questions

I have a DFG GT with black Cobra R's with deep dish out back (17x9 front, 17x10.5 rear) with 315's. I LOVE them. Heres some pics. I coulndt really get a good shot of the back tires, they look alot smaller than they are in the pics.
http://www.automodding.com/showpost.php?p=10006982&postcount=29

One thing I could never understand why people do it is get 17x9 in rims all the way around and put different size tires on the back and front. You cant rotate them, and might as well have went balls to the wall and got the DD. My car is my daily driver and I love my huge ass tires.

EDIT: I think my wheels would look absolutely SICK on your car.
 
I have a set of 2001 chrome cobra wheels if your interested.

17"x8" with bfg 245/45 zr17's (front)
and MT drag radials 275/45 17's rear, and lug nuts to match.----All for $1000---- plus shipping