Thanks for the great reply. I probably should have mentioned I'm not the kind who needs like a million buttons on the mouse. I'm leaning more towards overall performance and smoothness. As you rightly said, it's about the feel and speed.
The problem with going to the stores and checking them out is that you rarely get the opportunity to actually try it out, and half the time, the stuff you actually want is never there, ergo getting it online. :P
The Naga has great reviews and a lot of gamers love it. I'll look more closely into it. Thanks