Go for blanks and get them machined...
My mate had his re-ground in his 306 GTi-6 and there is noticeably more of a tappet type noise than before, due to the lifters having to be pumped right up to cope with the now smaller sized cams. The lift is still the same with the re-ground cams, but the low point is lower than on a machined blank.
They made that noise on the original engine, then that died (bottom end problem) and he managed to blag a new one off Peugeot under warranty. Now the cams are in the new engine and even though its only a few months old it still makes the same tappety noise.
After this hed never go for re-ground cams and neither would I.