I have the Logitech K800 myself , wonderful keyboard
I've previously owned G15 rev1, Saitek Eclipse, Razer Lycosa, then K800 and by far I think the K800 is the superior of all in terms of day to day use
as far as gaming, i feel this goes to the Lycosa due to the fact I NEVER had an issue with multiple keypress sticking. The K800 seems to need me to lift-off all keys every now and again if I am doing something complicated and requiring constant keypress (like flying a helicopter in BF)
Honestly tho given the small performance issue with the K800. I forgive it because its the quietest, smoothest, easiest to type on, most aesthetically pleasing, and convenient keyboard I've used to date at home (not including all the keyboards at work, but they all suck anyway)
I recomend the K800 simply because its the best overall product. Not the best for gaming, not the best at "clicky feel" but I can still type 140WPM, game happily, have a black light that automatically turns on when my hand comes near it, and goes 2-3 weeks between charges even with sitting at the PC all hours of the day. I am very satisfied with my K800
buy it