Sorry I just woke up. Long day yesterday.
Anywho. I never really liked any of the Tritton headsets. When their sound quality is okay, the pricing becomes rather ridiculous. Plus I was never a big fan of "5.1" as you could see from my massive rambling in other threads. It shouldn't be a big factor to consider
I've actually heard good things about the SB Arena headsets, but the pricing is a problem when you compare it to the carcharias which can usually be had for about 69.99. If you catch the SB Arena on sale for cheap, then it's definitely a contender.
PC350 definitely has the name, and the potential to be great. However because someone in the design apartment had a stein too many, the bass got neutered. The PC350s have the same drivers as the HD595, but when there's a huge piece of plastic covering the entire driver, nothing permeates.
Modding the Sennheiser pc350 headset - Head-Fi.org Community
This mod makes the sound really come alive, if you decide on it. With that mod, no gaming headset you listed can even touch it.
Lastly, since everyone already recommended the Carcharias, I have to say something about it. It's a great headset at that price range. Sound signature is very warm with plenty of bass. In terms of positioning, a pair of speakers which have wider sound stage definitely will be better, but that being said, it's not terrible. Aside from that, it's VERY comfy. As opposed to the SB Arena, which seem to be closed headphones, which will sweat up and get rather uncomfortable.
here are the lowest prices I found for these
PC350s 130-140$ new
Arenas 78$
Carcharias 70$
Trittons 83$
So..in the end. I would actually recommend the SB Arena or the Carcharias. Where the SB Arena has a slight edge over the Carcharias for sound quality, but Carcharias is slightly cheaper with better comfort for extended gaming.