Personally, If I already had a well looked after and paid for TCR in a colour you love as my daily and practical everyday car, I would buy a more extreme used weekend car. 25k miles is nothing. You could easily run it years to come. 286 vs 321 BHP in normal driving in FWD won't be a leap in performance. You really need to get onto a track. I asked my Sales Rep that my warranty won't be voided using this track focused hardcore Edition 50 at track days as intended, right. 'I'll circle back to you sir'.
I love sports cars, so Cayman, Alpine A110, F-Type. For coupes, You could also look at the c63 v8 w204 and w205, incredible sound!
If it's a single car, and you're okay with the depreciation, get the Edition 50. Likely the last of its kind.
If the 2.5 Golf R comes out for next year, that's another option. Then again, Autocar just reported last week, Audi's board have yet to decide on the 2.5's future, and could add hybrid to make it Euro 7 compliant, in which case they're defo not giving it to VW.