The set I got is great....39 bucks at xforce3d.com. I like them, they have a VERY handy inline control that turns the unit on and off, as well as their design which sits on like headphones instead of sitting on my nose...I wear prescrip glasses and the wrap around ones I bought fit real nice over both those and my huge wrestler-sized head. I had a set of Edimensional glasses, they were wireless but were defective...and cost 70 bucks more.
The cheapest set I found was a mere 19 bucks!
http://tinyurl.com/2ayxyqIf you've never tried gaming with these, you're missing out big time. I play a lot of first-person shooters, but I always got owned because there was never any sense of depth...but not any more. Between that and my surround-sound headphones, it's pretty hard to sneak up on me....