Hmm I saw that Corsair headset on sale at Newegg the other day (I checked and it still is $59.99 after $10 mail-in rebate), and I've been tempted to pick them up. With the glowing feedback here, I might be more tempted now! My only worry is that I have a rather large head, which causes some headsets to be a bit uncomfortable. How is the V1500 with that?
I noticed a few people mentioning needing positional audio. I'm guessing that you don't have 5.1 setups hooked up to your PC? I only use my headphones when I need to use my mic as well, so if I'm playing a FPS solo, I'll just use my 5.1 speakers. A good game should take advantage of your rear speakers, but I've found that some don't. :\