I too have had bad experience with razer, lychosa keyboard and headset carcharias or something, both causing random problems from audio failure on headset to back-light of keyboard flickering and keys not responding randomly.
On the other side of the table, I also have Logitech which works perfect, g19 keyboard, g35 headset, and mouse Mx518 which is pretty old but works like brand new.
Even tho I agree razer stuff looks better, Logitech is just bulletproof hardware.
i7-4770k - GTX 780 Ti - 16GB DDR3 Ripjaws - (2) HyperX 120s / Vertex 3 120
ASRock Extreme3 - Sennheiser Momentums - Xonar DG - EVGA Supernova 650G - Corsair H80i
build pics