new ride, calling rx-8 owners

[lightspeed]

So I just bought an rx-8 for a daily driver. I realize that the car has little power-increase potential, which is precisely why I decided to buy it. I needed a fun-to-drive daily driver that I cant really modify and will therefore hopefully stay reliable for a long time.
Having said this, do any of the rx-8 guys on the forums have any suggestions on proven suspension mods for the car? The car is amazingly fun to drive, but it could probably use a little more roll-stiffness. This chassis is so stiff that I think it could handle even better with a few minor suspension tweaks.
Has anyone done basic mods like cat-back or intakes to these cars? Although those are the most I would mod the engine, I would probably do them if it made any difference. What about noise level with cat-back though? I know these rotaries can sould like pissed-off chainsaws with certain systems, and I really dont want that. I have to listen to it everyday.
Thanks in advance.

[David88vert]

http://www.rx8club.com/

[lightspeed]

http://www.rx8club.com/

I was checking that out a while ago. I dont know if Im depressed or excited, because apparently there isnt much of anything that will make them fast without nitrous or a turbo. Mission accomplished I guess LOL
Does anyone on the forums have an rx8 with exhaust mods? Id like to hear the Racing Beat one in real life. It sounds good on the video clip I saw...better than the Greddy.