Street triple brake pads.

Not sure about the Street, but read a dealers view on the Speed and one thing they said was to use original pads as third party ones can eat the disks.

 

+1 wot Wes said.
Just bought set for SWMBO's Street3.
Not cheap at about £72, but cheaper than new discs (and feel good).

 

I don't know if what I fitted to my Bonnie will help you but I fitted EBC HH pads to front and rear and they are brilliant, probably done about 2k with them in now and no signs of disc wear.
Got them from Wemoto