Looks like I'm in the same boat; I got all 284 gold medals in the US version of Wipeout Pure, and the wait for the US version of Wipeout Pulse was too long, so
I ended up winning the European (well actually Australian...) version of Wipeout Pure on eBay by 5 seconds or so. Were those extra tracks worth it? YES!!!

Reading through this thread and this thread, it looks like I'm missing UCES00001DCLASSICMPAK1 and whatever those "Pure Urban" downloads are. Anyone want to put them up? They're not in the download in this thread.