keyboard problem

sup guys, so recently i bought a new keyboard, a cheaper one because my last one was not smooth touching the keys, and i went to ljs with the new one, my sync was awful.. i switched to the old one and my sync went to normal.. 80% sync or whatever, how? keyboard definetly matters, the response of new one doesnt catch all strafes correctly and im doing the exact stafes and movement on both keyboards.. can u guys recommend me a keyboard?
ps. my english sucks monkey bawlls

mechanical... i personally have a razer blackwidow 2013 ultimate and i love it. definitely need to feel the keys before you buy though make sure they fit to your liking