Not really an upgrade IMHO. Like Noobs said, the rotors on these cars are kinda on the small size for the weight/HP, so the last thing you want to be doing is reducing rotor mass.
If you like the looks of them, go for it.
If you want more bite, bleed your brakes well, and then research pad technology. The thing with brake pads is that it's very difficult to get a pad that does everything well. There will always be trade-offs with noise, dust, cold-grip, etc. The debate on the best brake pads can get as messy as the "what is the best oil" debates.