I'm very happy with my Logitech G 19 keyboard - if you are an avid gamer, the LCD is real nice - but at $200+, she isn't cheap. The fact it has an AC plug on it is a bit of a PITA as well.
I've found the overall quality of "high end" Logitech input devices to have gone downhill in recent years. The first G series keyboard I got still works fine - WASD keys have the letters worn off, but functionally is like new. My first G 5 mouse was great, but I am finding myself buying a new G9 each year on other machines because they develop dead spots on the newer built ones. Not something desirable on a $100+ mouse.
My G 19 is a couple years old, and getting extremely bagged out, but I play WoW (mainly BG's) and the LCD display is just super for that.