Yeah there are several brake conversions you will find for that price.. Upgrading pads would be a good idea.. Upgraded disks I think are a waste of money..
Grooved disks are good, but drilled disks are liable to crack.. Flat faced disks are still great, as long as they are vented. If I were you I'd go for a second hand 266mm front disk conversion. There are many models of Citroen/Peugeot that use this set up.. Such as: 306 GTI-6.. 206 GTI, Xsara VTS, some Berlingo models etc, etc... If you are using 14" wheels you may have to angle grind a small amount off the caliper, but this is no biggie..