I have three possibilities to installing and running Ubuntu as my main operating system.
1) Install onto an external SSD: Obviously, this would mean installing onto the External SSD and connecting through USB. I would have my main drive at start up select this driver, if not, it will select the Mac boot up (therefore, I don't have to completely remove OSX). I will also make nightly back-ups of my SSD to another external HD plugged into my main computer.
2) I completely remove OSX and install Ubuntu onto my main machine, use the external SSD to store all the files and libraries needed to carry out my programming duties.
I prefer option one since I can take the external HD to work with me and just boot straight into there.
I'm just asking for your opinions guys.
P.S. Also, I'm running VMWARE at the moment. Can I therefore just use the .iso that I already have? I don't really want to completely re-install Ubuntu as on the VMWARE I have already installed a large number of libraries.