I wouldn't really spend the extra on discs, TBH - Pad money is where it's at, IMO.
EBC do some plain discs, now, & along with their red/yellow stuff pads, make a great combo at a reasonable price.
Cheapest I found a few months ago, was from here >>> www.buypartsby.co.uk 
Top man cheers Ivor? Would you not bother putting drilled ones on then? Or go 312mm discs? 
No, they'll wear your pads out more quickly. Like I've said, many a time, your better off spending the money on decent pads instead.

312's do stop you better than the 288's, no doubt, but they just upset the balance of the car under
HARD braking with 232's at the rear, IMO. (Nothing dangerous or anything you can't live with everyday, just too much of a difference between the two when driving on the edge, for my liking).
If you've got the extra ~£100 to throw at the 312 carriers, then go for it!
