Wanna try a good one then

Nowt wrong with drums, nowt wrong with discs.

Pad material on the back if using discs needs to be the softest you can get (many people make the mistake and use something uprated like Mintex 11' series or Ferrodo DS etc - these are WAY to hard for the back)

Work out the cross sectional surface areas of the materials / combination used (drums to discs) and there is not much in it.

Discs are far easier too look after tho