Really dont know if i should trade F1 for this, only just got it, but also really need GT5, as for the 45mins install you dont have to do it, the game has a feature where it installs incrementaly when you unlock bits.
F1 2010 and GT5 are two different types of racing game. I'm keeping both, as F1 2010 allows me that F1 fix, hopefully GT5 gets the GT itch out the way.
I can understand trading F1 2010 in for GT5, GT5 is a more interesting sounding game. Has a lot more features etc... F1 2010 is just F1, GT5 is Rally, Nascar, Karting and GT world circuit racing...
They are two types of racing game, bit like how you play Dirt 2 along with forza 3 on a 360...
Not saying don't get rid of f1 2010, but consider if you want to continue an F1 career as well as race, buy, tune and enjoy a GT style game with extra content such as karting and Nascar...