I decided to get a new tripod. My old one was just a cheapie, and it was missing screws. I bought a Velbon Sherpa 5370D tripod with PH-157Q head.
I can't seem to find a lot about the tripod on the web, but it seemed similar to the 600R. It has the splittable centre column and 3 position legs that can get you right down on the ground if you need to. Hope the quality is OK. Seems to be well made though.
The PH-157Q head seems to be very common and fairly well reviewed. As a bonus, it has the same size thread as my monopod, so I can use it on that as well.
Quite happy with it, and can't wait to try it out in the field.