Congrats!! Is this your first RX?
I have the Logitech G25 system, which includes the separate 6-speed shifter and full pedals, including clutch. I think it runs $300. I then got the Obutto Ozone (http://www.obutto.com) racing cockpit, which is dirt cheap compared to others, but is very solidly built. It even has the separate mounting thing for the G25 shifter (which can be mounted left- or right-handed). It was another $259. These two things make playing GT5P (or any car game) seriously fun and seriously real.