I guess some of us agrees that some of the older IBM keyboard models rock.
I've had trouble with keys getting stuck on the 6Gv2 too, but I removed the keys in question, cleaned the key and keyboard. Problem solved. The problem was probably caused by spilled soda containing lots of sugar. I do agree that steelseries 6Gv2 is not the best keyboard, but it is IMHO the best keyboard you can expect to be available at your std computer store.
Use ps/2 for your keyboard. No reason to waste an usb slot.