your suggestions please

Ok so i have a Godspeed set up and it has warped.Have changed my bearings out(Cheers DR K) and have cleaned my hubs.Now i have been reading threads saying quite frankly Godspeed are shite.So instead of spending 350 notes on new disks and then new pads i am thinking of changing these out.my calipers are the same sat up as these
http://bbs.scoobynet.com/private-for-sale-general-17/839134-brembo-calipers-bells-pads.html
so im guesing i will need new brackets so can some one suggest a very good performance brake disk and pad combination and as big as possible to fit under 17".Godspeed are 335mm but he is a one off size.Best regards Mal....