Why not?
your list has less than 16Gb
16 is a lot, unless you do 3d art etr you'll not need it.
you'll have to replace all your RAM to go up past 16 anyway if you buy an 8Gb kit.
Ultimate gives you:
BitLocker (encrypts data on internal and external drives); DirectAccess (connectivity to a corporate network without VPN); AppLocker (prevents unauthorized software from running); and BranchCache (speeds up the accessing of large remote files at branch offices).
Are you really gonna use that for the 30?
even then I'd argue to get home and have the option of the 'anytime upgrade' if you need more ram, As a few years you might want windows 9 and the 50-60 you saved will be there to buy that