I've run ubuntu for a year without ever using the command line interface,
GUI seems much safer to me.

If 10.04 works from a live disk then install it as dual boot,
it should be able to read all your windows data,
and hopefully everything you need will be there.

But windows viruses and stupid games wont work.

WUBI seems a waste of time to me - and I dont think it can see your windows
data.