The x170 definitely has the best cooling solution with its massive radiator.
In fact, it is very sad to see only all these new models with their bga chips soldered on the board and very mediocre cooling. They definitely have their advantages for those who appreciate mobility, more slim design but I just can't bring myself to love something like that.
There is also probably no hope that we will ever see at least some of the new series of video cards in mxm format from Clevo. That would be great too actually, and I keep waiting for a miracle.