Gary Fisher 29ers have the new Genesis 2 technology. Short version is the fork has been offset which allows for a quicker/tighter turn ability. This change is quite evident and makes their 29ers very fun. Fisher models start around $900. You could always go with their new carbon 29er, the Superfly, that weighs in around 24lbs - now that was fun.

I agree with DirtDiva on the size of the bike and your height. If you are taller, 29ers are going to be easier for you to handle than if you are shorter. One advantage not mentioned is I feel they climb easier than a 26" bike.