Any other people wish to contribute? Thx!
I have both the original Naga and a Naga Hex which I've used for the last two CBTs. I like the functionality and ergonomics of the Hex much better. The mechanical switches on the Hex are very sensitive and allow charge + aim skills to work without disrupting aim. It really depends on your grip type, though. If you use a claw/fingertip grip, the Hex is obviously much better and requires much less of a squeeze to activate. The Naga requires a significant squeeze to activate. If you palm, the sensitivity of the Hex mechanical switches do not require any counter force on the right side of the mouse to activate. The same could also be said for the Naga but I personally don't find it very comfortable. The Hex is a good investment for a lot of upcoming games: TERA, Diablo III, GW2, Path of Exile, Torchlight II, etc. I like the Hex much much better than the Naga. I just hoped it isn't as notoriously flimsy.
There are four downsides to the Hex, though: 1. Synapse - I hate hate hate this thing and wish there was an unobtrusive driver; 2. Switch sensitivity - holy crap these things are sensitive. The hex requires more of a break-in period than the Naga to find the optimal thumb position and thumb rest so you don't go accidentally hitting buttons. Even M2 (right click) is very sensitive. At the same time M3 (scroll wheel button) requires much more force; 3. Less buttons - not really an issue as I don't need the 6 extra buttons to clutter the mouse AND I'm using a G13 gameboard so I can move and balance skill activation between both hands; 4. Design - it's ugly.