Hi guys,
First post, but I saw this thread and thought i'd chime in and say hello. Future lexus owner, but have had a couple of cars which I used to take to show and shines before.
If you're after a decent product that's relatively inexpensive, definately go the meguires. Meguires Tech Wax 2.0 works great, I had a few complaints about the original Meguires Tech Wax 1.0 which didn't seem to harden all that well and most of the wax was gone by about week two of driving. But speaking to the australian rep about TW2.0 they've addressed this issue now with a new formula and they sent me a few test bottles.. I can definately say they have improved on it.
I'd say for a graphite car (or any dark car), go the Tech Wax 2.0, and grab a bottle of Quik Detailer for between-waxes. Gold Class soap also seems to still do a decent job for washing.
For white cars, check out Poorboys Natty Wax, highly recommended.
Show us pics when you're done detailing won't you? :)