Best version of Windows 7 for Netbook?

Google will keep this alive for years, possibly forever.

I was googling through for this type of info too.
I have a Sony VPCYB15AG netbook model which is running on Windows Starter® Ed.
I'm thinking of a clean Win7 Ultimate install on this with a USB flash disk.
I don't have any driver CD provided with this netbook so i might have some driver issue later. Can anyone tell me where to start?
I hate the fact that I cant change the netbook's wallpaper with the Starter Edition.

I still haven't created a bootable flash boot disk yet but i think there'd be no problem with that as there're many tutorials out there to guide me through the process of making one.
I like the fact that Win7 Ultimate provides lots of features which i could switch on/off if the needs arise, unlike Starter Ed.

p/s: First post of this thread was 2years ago..