I was also not happy with the rear wheel offset, even with the 3/4" spacer. The inside of the tire was very close to the rear inner fender, and the outer tire was tucked way too far inside the rear fender. So I picked up an additional 1" spacer. This new spacer actually bolts to the lugnuts coming off the axle, then has an additional set of lugnuts for the wheel. Its made from aircraft aluminum and IMO looks and feels like a nice quality product. Here is a pic of the spacers mounted.
(IMG:
http://www.zeppelinsreef.com/images/war_eagle/spacers.jpg)
Here is a pic of the rear with just the 3/4" spacer in place.
(IMG:
http://www.zeppelinsreef.com/images/war_eagle/old_spacing.jpg)
And with the new spacer added.
(IMG:
http://www.zeppelinsreef.com/images/war_eagle/new_spacing.jpg)
I'm much happier with the new rear spacing.