Hey ranch,
Quick update, I decided to go with the MBP retina (8 GB ram, 256 GB SSD).
I ran a bench mark on my Windows machine, I ran every single application I could think of using:
Eclipse (2 instances), iTunes, 2 virtual machines, Firefox with 20 tabs, IE, Microsoft
Word, etc, and I only got up to 4 GB RAM.
Still getting used to my new mac, in the process of setting up my development environment