I have a 2015 GTI. Obviously I modified it, but stock, out of the box it is stellar and will serve you well for your commute. The four-door has quite a bit of room in it also. My wife and daughter sit in the back together when we travel anywhere and have no issues with space at all (I'm 6'1" and she's 5'9" and sits behind me).
As others have said, the Mk6R is nowhere near the car the Mk7 GTI is. The entire platform and engine is much better in the Mk7.
That being said, you want to look for a 2016 or newer GTI. They have the USB port to connect our smartphone and Apple Car Play.
Also, I did have the APR Stage 1 HO tune with the stock clutch for over 1 year and had no slipping issues at all. It is basically a crap shoot as to if the clutch slips or not. If you're buying used, you have no idea how the previous owner drove the car and slipped the clutch when they pulled out. I had a 2000 VW Golf GL with over 230K miles on the original clutch and it still held strong without slipping. But, that was me driving the car for 99.9% of the time.
Here's one in NY for $14500 with only 41K miles:
https://www.cars.com/vehicledetail/d...0743/overview/