Speaking from experience DONT I bought a 64gig SSD for my laptop thinking sure i'll only have wow and the os.. this is of course after all the windows updates after installing wow i had a grand total of 10gig left.. and let me tell you that was anoying as hell, not to mention further windows updates. Do yourself a favour and get a 120GB NOTHING LESS.
The 64GIG is now in the EEEPC simply because i didn't want to have it wasted.