Triton Pro's or their new ones. Real 5.1 surround. So the cars sounds are correctly located. I can not stand using the 720's which are simulated surround. For they need three speakers in each ear piece minimal. The real surround sound headsets allow you to hear cars at all corners. Helps to judge when clear. When one is beside or back corner. Coming from a pretty good theater set up I could not use the faux surround. Cars just had no position for me.
As for buttkicker. Wouldn't want to race with out it. If you can do one of the bigger ones. No regrets.
If you don't mind building your own stuff aurora shakers are way better the tue gamer 2 so I've heard. I use a gamer 2. Grab a sub amp and one of those aurora's You be shaking it up!
The buttkicker IMO is adds immersion only rivaled by the wheel. Buttkicker better then triples.
Edit: hill try these links for a shaker set up
http://www.parts-express.com/pe/showdetl.cfm?partnumber=299-028
http://www.parts-express.com/cat/subwoofer-plate-amplifiers/332
Zero, he is supposed to respond in the thread shortly.
thank you much.