Gran Turismo 5 Prologue: Disc or PSN?

[selnor]

Squall_Leonhart said:
I prefer to have the disk too, there is something about having the box that makes me proud :D

Probably just to show them off i suppose, being male and all we are all like that lol

What if downloading the games was 10 - 20$ cheaper? Cause I know it cuts costs massively for devs.