Thanks for the response. Strangely I've been considering the SEIG Super X3 for a while but I don't know enough to know if my instinctive choice is a good choice.

I don't think I'd be working much with titanium, I've been told by others about how difficult it is to work in, but there are things that I'd eventually like to be able to make out of the stuff. As for carbon fibre... I'd actually forgot to add carbon fibre to the list of materials I'd work in. I knew there was a material I'd missed off the list!

I generally haven't considered buying used machine tools because I wouldn't know how to fix it if it's broken. I guess I should look around more.