I don't personally have experience with the Deore disc, but have heard good about it; if you'd rather have something else, look at the Avid BB7. The combination of simplicity and performance is pretty much unbeatable, not to mention price. (You can outfit 5 bikes with BB7 for the same price as what you'd pay for 1 set of hydro's, in most cases!) One thing I'd say is, when you use the BB7, use XTR cables -- the feel will be extraordinary! Any V-brake lever will do, but I've had a lot of happiness with the Tektro carbon levers (about $56); I'm presently running the blingy TRP carbons (NO slop in the lever AT ALL!), but the Tektros are awfully nice.
A setup like this for both wheels can be had for less than $150 total.
Other than apparently having some uncomfortably deep pockets, I'd want to know why you would want to upgrade from those Deore Hydraulics. Since you just bought this unique bike maybe you should think about riding it like it is for a while so you can justify an upgrade for a reason other than "just because I can".
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