Recommended router bits

Can anyone recommend a good source of router bits in the UK?

Also what router bits would you recommend? Iv never done any milling before so i have no idea where to start.

one, two, three or four flutes. 1/4 inch or 1/8 inch. endmill or slot drill?
Will one cutting bit be suitable for aluminum, plastic and MDF, or do i need to use different bits for each material?

I also still need to purchase a router, i assume the dremmel i have sitting the draw wont be anywhere near powerfull enough.

Has anyone used one of these makita copies from ebay?

I used my dremel for a while and it worked fine. Use what you have and upgrade later. All you need to do is print another mount.