Hi

I'm looking at getting a Chinese 3020T (or possibly a 4030) CNC Router for general hobby use, school projects, etc. The main use would be for routing single and double sided PCBs, but I would also like to be able to machine Aluminium and Carbon Fibre sheet.
My question is are these machines generally up to the job? What tools are best for Carbon Fibre and which tools for aluminium? What have you found to work well?
I used to work on control systems for million £+ machines, and I appreciate this is the extreme other end of the scale. I don't want to waste money on something that isn't-up-to-much and isn't going to be any good for what I want it for, but with limited workshop space (and money) a full cnc mill is well out of reach.

Your thoughts, please.....

Thanks