Going through exactly the same dilemma. It’s odd that you can only get the GLA 200 in Sport trim – seems totally arbitrary. I have the 200 engine in my A-Class and use it mostly on motorways, where it is fine, but I feel I wouldn’t want to drop to the 180. The 200 Sport trim lacks the seats I need so is out for me.
The Tiguan didn’t work for me as the seats lack side support, but the new Qashqai and X1 are in my thinking.