Yep, I went for 16GB and maxed out the processor, very glad as well. The specs are still well above average for the industry, I don't think I'll replace it til 2019 barring an accident or whatever.
It's actually really easy to install Ubuntu on a Mac these days, and even dual-boot. I did it a couple years ago on a small partition for fun. I still vastly prefer OSX though, and the trackpad drivers are much smoother in OSX.