P4 calipers are an effective (& relativley cheap) option. The brakes on my 888 were appalling, and have just fitted brembo cast iron full floaters and a brembo radial master cylinder, and the difference is incredible..even with 'average' pads.
Everyone should have a brembo radial MC !- there just brilliant and look trick (see pic!)
I have the 96823402B
ducati performance SBK radial upgrade kits here..consisting of a 19x20 radial master cylinder, braided hose kit, and the pressure switch to operate the brake light. List is £456.12...if you want one ill do it for £250...U2U if interested
Cheers
Nat