these will be standard cheap discs, with grooves cut into them
You might as well fit bog-standard discs - the grooves don't do much on a standard road car
Its the pads the make the biggest difference - great pads on poor discs will be a LOT better that poor pads on great discs
Mintex extreme are pretty good
However, I'd be tempted to ask Alternative Autos for a quote on their stuff
(actually, I'd be tempted to hit the credit card and buy some proper brakes - see the latest Pagid Group Buy)