Glad you like the camera!
The G3 is my first camera, so I really have no basis for comparison. :)
Thankfully, there are excellent sites out there, like www.dpreview.com!
I picked up a Transcend 512mb 25x CF card to mate with my G3. The card is noticeably faster than the 30mb CF card that came with the camera. However, to really take advantage of the speed, you'd need two high-speed cards and an image tank (portable hard drive that can read flash cards) or a...