What sort of pipe do you recommend for fitting central heating?

Plastic or Copper?

As money is tight at mo, i looking at running all the pipes for my central heating, was going to use copper as thats all i've ever used when moving radiators etc. But ive heard alot about plastic pipe, which is alot more easier to install for underfloor boards and then copper to radiators? What sort of fittings are used, the pushfit ones??

Cheers for any information?


P.s
I've tryed DIY forum's and they just said get a pro, which didnt help!