Found a cheaper alternative to Ansen Sprints... will they fit?

http://www.performanceplustire.com/products/productID/6225

Ultra Wheels model 50, they look cool and they're $94 each instead of $140 for Ansen Sprints. They look a little more "modern" and I like that. Now the question is...

Will they fit? I've narrowed it down to the 050-5765K, the 050-5865K, and the 051-6865K.

I'm unsure if the bore will be big enough for my Mav disc brakes.

Also, regarding width:
The first is 15x7, then 15x8, then 16x8. How wide could I get the tires on the x7's, and would the backspacing on both x8's work?

 

Here's the manufacturer's website, read the Tech Specs, it has the bore sizes.
http://www.ultrawheel.com/wheel_detail.cfm?brand=1&id=32

Good lookin wheel.

 

Looks like a pickup truck wheel.

 

They have a Comet version.

 

I've determined that the bore is indeed large enough! Now which wheel size do I want is the question now...

 

Check out the review on Tirerack.com. Stated that the wheels were a very soft material and easily damaged.

Nice looking though.