Honestly there is no such thing as "future proofing," even more so when it comes to mac laptops.
What you need to look at is how long you want/need this laptop to last?
Unless you are actually using the laptop for demanding programs (video editing, 3d design, etc) then the base non-retina MBP will suffice for years.
Just make sure to equip it with a large enough hard drive and enough RAM (8+) and you will be fine.
I am writing this on my 2010 base MBP with 4gb RAM, and have used it through college running both engineering 3d design and simulation programs. I plan to sell this either this year or the next one and buy a retina model to enhance photo editing, but otherwise I can see it lasting much longer.
They only reason I could see yourself getting a non-retina base model would be if you really wanted the retina screen (which I'll admit does look very nice).
If you want to increase the RAM or hard drive I really recommend buying 3rd party and installing yourself, just watch a youtube video it's very simple.
Hope that helps, good luck.