I would start with the top build, then cut back on the "extreme performance cooler" and maybe somewhere else too in order to get a larger boot drive. Unless you are planning for a second graphic card, you dont really need a 750w PSU.
Windows and your default software by its self will max out 60gb -- if you want any programs on the drive it needs to be 120 or above. Also with SSD prices dropping you can get 120gb for $100 pretty regularly.
Edit: Just preference, but I like my Asus mobo. It will likely be easier to use than the Gigabyte.