I know you have to take bikes tests with a grain of salt b/c of partiality, but Mountain Bike Action just reviewed the Fisher Fat Possum X.0 and they gave it a big poo poo.

"The all-mountain category is tricky. A bike with six inches of travel needs to pedal well, but tackle terrain nearly as well as a downhill bike. Furthermore, in a couple more years, who knows what qualifications will warrant placement in this dynamic category?. On paper, the Fat Possum X.0 looks amazing. It has a top-shelf component spec and six inches of travel. However, a couple of blemishes are too glaring to ignore. We feel the Maverck forks are of the boutique variety, catering to an older, les-aggressive rider. The six-inch-travel Possum would handle better in the terrain it's designed to tackle with a fork like the Fox 36 TALAS, Manitou Minute or RockShox Pike Air.
The single-pivot design is nothing new, and traditionally laterally stiff. Not here. On numerous occasions, our swingarm made contact witht he seat tube (on both sides) when hammering technical trails or carving a berm. Holding the saddle and lightly pulling on the rear wheel would result in the swingarm making contact with the seat tube.
The Possum was dissapointing. It often handled like a bike with half its travel. It's not on par with all-mountain category leaders like the Specialized Enduro, Santa Cruz Nomad, or Kona Coil Air."


So, the bit about the fork won't apply, because the Fat Possum you're looking at doesn't utilize the Maverick fork but the frame sounds like a flexy piece of junk.

I haven't been super keen on Cannondale b/c they are so pricey compared to some other bikes in their class, but the Gemini has been used locally for Freeride and urban by at least two people in my general vicinity. They seem to like them and they have held up very well.

My favorite would be the Specialized Enduro with the Fox 36. If you can go that high on spec, you can't go wrong. The standard Enduro, though still sounds like a real winner especially compared to the Fisher. For your intended purposes, I would go with the Specialized. It would be a better "all around" bike than a heavy old Gemini due to weight and pedaling efficiency.