To the guy who gave the AXPro a 4 out of 10... is it at all possible you have a bad unit?
I bought my brother the AXPro's for Christmas. I only listened to it briefly, but the bass is much improved over my AX360's. Looking at Newegg and Amazon reviews, the sound doesn't appear to be one of the weak points. I guess it depends on your needs and expectations.
I only needed something for traveling. I have a 7.1 speaker setup at home, and it's in the basement so I can game as loud as I want. The AXPro's weren't available in July when I bought them, but I'm not sure if the upgrade would be worth it for me. The AX360's fold up and only have one AC adapter, making them easier to travel with, and are half the cost of the AXPro's. For something I use 2-3 times per year, they are good enough. I wouldn't want them to be the source of my audio full time.
My brother, though, has been using his TV speakers. He doesn't have a receiver/speakers in his budget anytime soon. He also has a PS3. So, for him I thought it would be good to have something with better sound, better audio control, and compatible with both the 360 and PS3 out of the box.
Once he opened it and we were going through the instructions, I was reminded of a feature that I had forgotten about, and which you never see mentioned in the reviews. The control box has outputs for a PC speaker system. He has a 7.1 Logitech system from a PC build a couple years ago, but he no longer has a desktop PC and uses his laptop exclusively, and doesn't game on it. The speakers were stored in the closet, and we got them out and hooked it up for him. What started out for him as a surround headphone gift turned into a surround speaker gift. No, Logitech PC speakers do not an ideal home theater make, but they're better than TV speakers, and they were already bought. And he has the headphones too for when we meet at our parents' house with our consoles on holidays.
The downsides I've seen with Tritton are:
(1) Quality control. One of the speakers on my AX360's didn't work out of the box and I had to do an exchange with Amazon. The control box on my brother's AXPro was defective out of the box and I had to RMA it directly to Tritton since I bought them direct from them during the preorder special. I sent it back the Monday after Thanksgiving (gave them to him early since we were together and I wanted to make sure they worked), they received it later that week, and I still don't have the replacement. Also, you have to yell into the mic on the AXPro to be heard on the 360. Tritton says they are aware of the problem and are redesigning the mic, and will ship a replacement when they are ready. They claim it is only a problem on the 360, due to impedence or some such, but whatever it is, I'm sure the 360 has always been that way, and it was their job to design it to work with the 360, so I consider it a quality issue regardless.
(2) Availability. You can't find these in a retail store. So when the QC issues arise, you're looking at an RMA process rather than a fast and easy exchange. My local Best Buy has the TB X4's. I don't know why Tritton won't put their products out there where people can actually find them and easily exchange them.
I'll agree that a Dolby Headphone adapter plus stereo headphones is going to sound better than multiple speakers. I've tried out the DH feature of the X-Fi with a cheap set of 'phones, and it was amazing. There's a little demo in the Creative software, but I was skeptical. I figured it was easy to sound good under a controlled experiment. So I fired up Doom 3 and found a pipe with a steam leak coming up thru the middle of the floor. I walked around it in circles, and stood in front of it and spun around, and the sound of the steam leak was always dead on. The problem with this setup is the limited options and the cost. When I bought my AX360's, the X4's didn't exist. $250 for the MixAmp setup was too expensive for my vacation headphones and blew the budget for a Christmas gift for my bro. And I didn't like that the JVC adapter ran on batteries and didn't know how I'd incorporate a mic and voice chat.
If I was in an apartment and headphones were going to be my only source of surround sound for movies and games, I think the MixAmp setup would be worth it. For everyone else, I think the AXPro or X4 will do the job, depending on your specific setup and needs.