There's the Mintex M1144 but a few people have said they're a bit squeaky. Ferodo do a set called 'Performance' that are more affordable than DS2500, not sure if they do a set for the mk5 GTI but it's worth looking up.
I'm assuming you don't do any trackdays or too much hard driving if you're still on the standard brakes, so oem pads should work fine. Pagid make good oem spec pads.