Hi Kong and a warm welcome to the forum.
Lathes have been talked about a few times on here so I would start by putting lathe into the search box and reading through the past threads.
As for what you need, my own is a Chester machine, as per this link,
http://www.chesteruk.net/store/conquest_lathe.htm but the particular lathe is sold through about 5-6 differrent outlets in the UK with differrent paint jobs and accessories. Some are slightly cheaper at different times but usually it depends on the accesories you want with it. Have a look at Warco and Machine Mart as other suppliers of the same machine.
As for capabilities this particular lathe will do exactly what you want of it exept for maybe cutting titanium. You might need to get hold of some special tool bits for that material but for hard plastics and aluminium you should be OK.
Check these sites out as well:
http://www.mini-lathe.com/Mini_lathe...x12/update.htm http://www.machinemart.co.uk/shop/pr...s/brand/clarke http://www.7xlathes.com/7x-tooling.htm