why do they do configs like this... really baffles me.
slower proc / more ram
fast prock / less ram
does battery life mean anything to you?
Also you mentioned "new with windows 7" so im reading that as you currently don't have windows 7, just make sure when they say "mirror" they are just meaning MOVE DATA.
Cause to me mirror means just that, and you don't want some old 32bit OS install being mirrored/imaged unto any of this hardware.
what models of the i7 and i5 are they exactly? they have a nice assortment to further confuse people :-P
here is a graph to help you along with your choice.. just keep in mind these are all desktop setups.