Right now I have a cMBP with a samsung 840 ssd in it and so far its amazing. I can get an awesome deal for the late 2013 rMBP, is it worth upgrading to the late 2013 rMBP with 4gb ram/128 pci-e SSD? I'm assuming OWC will eventually release a pci-e SSD for the late 2013 models but who knows when. I don't do any editing and gaming is to a minimal so the 4gb ram won't effect me much as the hard drive space. Thoughts?