Oh BTW, top tip... Avoid one with a sunroof unless you want to keep paying for replacement surrounds when it cracks
Ohhh I am glad you said that! Pan roof was something I wanted - you were right with your first comment too, TCR is the only rare one 
The panroof surrounds can and do crack, mine did at a few months old. The issue was poor fitting at the factory. Mine has been perfect since it was replaced (famous last words) and I would think that if one has lasted this long then it's likely to be fine. It's a great feature and I'm glad to have it.
I had a MK7 GTIPP before and changed to the TCR as the 'R' engine was so much better. The bigger turbo is still giving loads of power at the top of the rev range which for me makes it more exciting to drive. Also torque comes in a bit higher and I find it breaks traction far less often than the GTIPP ever did and has never given any wheel hop, one thing I hated about the PP. I also like the deep bass note of the exhaust and the looks, still relatively subtle but is more purposeful.
GPF can be annoying when it needs emptying but is easy to sort out. Overall I find the TCR a great ownership experience, a little crashy with the suspension but okay and even with the bigger turbo, fuel economy is excellent. 45mpg on a run is not uncommon, 48+ achieveable. Around 36 as a long term average.
Of the three you asked about, TCR everytime for me.