Save your budget, buy the ES-Go. Add an EQ pedal to shape the tone, if you feel the need. Note: the preceding was a free opinion - your bucks, your choice.
I prefer the sound of my 814ce, but the GSmini gets plenty of play-time. I find the ES-Go sounds a bit more "electric," but the aforementioned EQ pedal or a decent mixer helps.
Best wishes with music college!
Captain Jim