Looking at the specs between the rmpb amd cmbp, all I can see is that the top end preconfig cmbp has an i7 and 2.9ghz as well as a standard Hdd. The rmbp both have a slower processor but have ssds? I understand ssd are faster, and retina displays are nicer but ultimately I don't need it the display. Are there any other reasons I am not thinking of that would make me want to choose a rmbp over a cmbp? Thanks.