Thanks, I won't be doing any heavy workloads or gaming in the virtual machine but will use some specific tools and apps for work which aren't available in osx. Will give parallels a try on the 8gb retina and see how it goes.
Just be aware it may mess up your drivers. I would recommend starting with vmware.
I even tried uninstalling parallels, and also the parallels tools, and reinstalling my bootcamp drivers, and it didn't help. Had to wipe machine..