Mechanical keyboards can be iffy. Some ppl prefer cherry red, some cherry blue, some cherry green or brown etc. Kinda sucks to spend a bunch of cash on a great keyboard just to figure out the keys are too soft or too stiff for your general comfort. Best bet is to actually find a kb in a store somewhere and get your hands on it. Soon as you figure out your preference or dislike you'll know where to go from there. Keyboards and mice are very personal, what's maybe great for one person may be miserable for another.
I have a light touch, so the DeathStalker would suit me good, but mechanical kbs have replaceable keys so would last longer with better performance. Each has its benefits and cons.