I've just bought Gran Turismo 4 here in Aus (released 10th March here) and have just found out that Aus region doesn't get the 1080i and 720p mode that I was soooo looking forward to for the Pioneer 505 I plan to buy in the next month. My question is; does the HiDef version of the game look that much better than the SD version on a HD Plasma? Is it worth chipping my PS2 to take either/both(?) US or UK games (cost 1 of $???) and then purchasing another version of GT4 (cost 2 of US$50) and cost 3 of frig-factor?