Wheels for slick only

I'm looking into purchasing some wheels and tires for the track only. Looking around I noticed that Bart Wheels seemed to be a cheap way to get into a 15" set. What do you guys think of these? And what backspacing and size do you see as best?

http://www.pitstopusa.com/SearchResult.aspx?CategoryID=3732

I will probably run a straight slick not a drag radial or something streetable. I'm also open to any other suggestions. Thanks.
- Justin
 
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