Rancher 350 TE Wheel/Tire Questions

I have a 2000 Rancher 350TE. It has the original tires on it, which are worn after 1350 miles. I will be hunting near a swamp in SE GA and want to get a more aggressive tire. I decided on the Kenda Bear Claws. I plan on getting the factory height/width. I also decided to get an after market aluminum wheel. Seems like the only size wheels they have are 12×7 or 14×8 for front and rear. Back spacing seems to be close to factory spec. Would you do a 12×7 for both or a 14×8 in the rear? Stock wheels are 12×6 and 10X8.5.

I have done several searches on this on Google, but new to forum, so forgive me if this has been posted before. i would like your recommendations/comments on rim size and tire selections. Also, is the benefit of a lighter rim even noticeable on the Rancher 350?

Link to wheels:

http://www.bikebandit.com/aftermarke…wheel?m=151378