But to be more elaborate on the reasons why I seem so opinionated. I did a hell of a lot of research before I bought a surround headset. My first pair (Medusas) cost me around 60 EUR and that kind of investment warrants some effort. My mistake was that I was persuaded by a competent and competitive gamer's opinion, but I also noticed that whenever "virtual vs true" arguments came up, those who claimed that true surround sound was a placebo, usually didn't have any experience with them.
By the end of the day, pure logic won. 3 speakers per ear vs virtual surround via 1 speaker per ear. When it comes to the effects it had on gaming, I was not disappointed, in fact, I was "wow´d". They required some finetuning, but once I got them set up optimally, the definition of audio, for me, changed. Their build quality sucked, though. One by one, rear and mid speakers gave up after about 2 months of use.
If the game supports surround sound (and most do nowadays), don't go virtual or stereo (for gaming [sic!]). If you really can't afford a pair of speakers which you mostly use for gaming, I guess Plantronics 780 offer a good bang for the buck.
I can't stress this enough, though. Surround sound in true speakers is very effective. You can hear even everything happen around you and you can pinpoint the source of the sound without turning. This is the main difference between stereo/virtual and true surround. With the first, you occasionally have to "search" for the source by turning towards it, because the surround effect is "muddy", unprecise. With true surround, you are already reacting to the sound, because you know its precise distance, speed, direction and if you know the map, location too.
By all means, it becomes a wallhack.