Tyfun 24in rims/ tires

[auh2]

Hello my first time in..have been lurking researching etc, thanks for a great site OK some ?s
1. Tyfun rims anyone seen or heard of them on a H2..?
2. the rim I'm thinking about is here.. http://superbuytires.com/v/Hummer/H2/2006/?diameter=24 TF15, there are no pics of them fitted to H2 [06 model], but on Tyfun's site i found a pickup pic with them ..here... http://www.tyfunwheel.com/images/vehicles/4x4_b.jpg
3. what offset is right for the 06 H2, as they offer ET 13, 20 or 38 ?
4. tire sizing on 24 x10s..from Powerdog
Specification Sidewall Radius Diameter Circumference Revolutions Speedometer Odometer Difference
315/70-17 8.7" 17.2" 34.4" 108.0" 587/mi 60MPH 10000mi N/A
305/35-24 4.2" 16.2" 32.4" 101.8" 622/mi 64MPH 10604mi -5.7%
325/45-24 5.8" 17.8" 35.5" 111.6" 568/mi 58MPH 9675mi 3.4%
the 325s is what I'd prefer, but they an inch taller and the recommended ..the 305 is 2 inches shorter...?? which size is best..[ H2 will be for highway, no major 4wdriving etc ]
5. will any of the above combos give/cause rubbing, and other than speedo error, anything else i should know about these choices before jumping in...??

All help appreciated