I have gone through MANY headsets and personally I think Razor are one of the worst headsets I tried. The sound quality is absolutely awful. I found the Logitech clear chat PRO to be allot better then anything from Razor.
I try my best to avoid everything from Razor, they are cheap and nasty. I thought razor was good, but only until I compared the sound quality to a real headset you can really notice the difference. Microphone is probably even worse with droning background noise
After I went through Razor and another bad headset I bit the bullet and got a Beyerdynamic MMX 300. Beyerdynamic have allot of great headsets, but starting to get a little to expensive, SO........
I vote Logitech Clear Chat PRO over anything from Razor. I have even been told that the microphone on my Clear Chat Pro is even better then my MMX 300 :S