the deathstalker you talking about is the one with the LCD numpad?

if you like the design and software functionality Razer provides, go for it.

I think it's a pretty good mechanical keyboard, but technically all mechanical keyboard brands offer the same thing
only edge Razer has is the advanced customization function available through their software, Razer Synpase 2.0
btw you should go and test out some other mechanical keyboards from brands like Ducky, Filco and alike because everyone has their own preference of what kind of key switches they like.

IMHO, most gaming keyboards are basically the same. What makes difference is the software that comes with it. 
If the software is not much of a concern, why not go for a cheaper ones?