As others have said, 14" vs 16" is a personal pref based on your usage. What's great is that for any given configuration, for the first time with the MBPs, you can get identical configs and it's just a +$200 difference to go from 14" to 16" across the board.
Except for the 14" base model with the double-binned chip (8-core CPU / 14-core GPU) which is only available on the 14". Basically, Apple is de-activating 2 CPU cores and 2 GPU cores that don't pass its tests, but allows them to still sell the chip vs throwing it out completely. It's a really good value if you don't need the CPU/GPU horsepower, which I agree with others your use case doesn't need.
If money / budget is tight, I think it's a great idea to save the $300 on the CPU/GPU chip, and put it towards the +$400 for the 32gb memory upgrade. Of course, only if you're ok with the 14" form factor.