Nice wheel! Grats! I have almost the same set-up you are planning, except I have the G25, Playseat, and the cheapo buttkicker. Try ebay, by the way, for the Playseat. There's a company on there with a great rating called maxwho that sells it for WAY less than $300 with free shipping.
As for the buttkicker, I'm still playing around with the placement of it, but at the moment I have it installed under the chair, attached to the front, thin, crossbar, using a 10 mm or so metal socket. It works pretty well! I'll try to get some pictures tonight of my set-up.
Oh and by the way, do NOT pay full price ($100+) for the buttkicker. There is an internet coupon floating around where you can buy it from buttkickerdirect.com for $50!!!
At $50, it is a bargain for tall the use you'll get out of it (GTA IV rocket launchers, anyone?)
