Going to shamlessly jump onto this thread as I'm looking for advice on a new deck and the OP listed 2 of the ones I'm looking at (NS Infinity and GNU Velvet Guru). For the OP, without knowing your typical ride conditions, I would recommend the GNU over the NS, from what I've read it's more stable, slower (relatively anyway, the Infinity is supposed to charge) and generally more suitable towards a beginner-intermediate rider.
Now for me...been riding for 10+ years but haven't been out much (as in only once or twice a season) in the last 5 years or so. My decks consist of:
143 Santa Cruz (no idea what model it's ~15 years old...fairly certain it's more of a beginner deck)
153 Option Paloma (year sometime between 2006 - 2008)
156 2010 Arbor Push
All are cambered, I've never experienced any other profile. I'm 5'6" 120 lbs, in the east coast so am pretty much always riding in hard-packed/icy conditions, and with pretty much no options other than groomed runs...so find myself always on my Santa Cruz, being the shortest deck (really saddens me that I never get to ride my Arbor Push, which is a dream). Looking to pick me up a new little one to retire the Santa Cruz, my main complaint being that it's slow. The three that I'm considering are the NS Infinity, GNU Velvet Guru, and Rossignol Diva. I cannot find a dealer anywhere by me that sells the Diva and the Infinity is pretty much winning by default at this time. I do like to hit jumps, but no jibs other than the rare box...so maybe it's best I stay away from the Diva?
Any suggestions (even outside of these three) are welcome!