on the bullit, as with any bike, shock set up is critical! i owned bullits for 3 years, with RCs, and one with a 5th, and i rode other peoples bullits, i rode some that felt like lifeless mushy piles of shit and others that rode like a hardtail with an itchin to buck you off. i spent about 2 days on the trail with a shock pump and an allen key with my 5th, was it worth it, very much so. the end result was a bike that had almost zero bob during pedaling, was supple for small bumps at any speed and was nearly impossible to bottom. set up is cruicial! i never noticed brake jack so much either, i mean, it was there, but once you learn to modulate the rear brake correctly, and put most of your braking on the front brake where it should be it, its very hard to notice.
on that note, the bullit is NOT a DH sled, sure you can set it up that way, but its not as efficient as other bikes out there, but if you want something that doesnt weigh as much as a volkswagen, and feels lively and doesnt mind uphill and jumps, its the way to go