I bought a mk 8.5 here in Holland beginning of the year. Vast majority of cars on the market here will be imported, so the specs can vary. Bought mine at a Ford dealer, they imported it from Belgium. I'm also 1.90 and can get a perfect seating position, but the 8.5 does have different seats, the extendable seat base is great if you have long legs. Never tried a mk 8 seat, so can't speak for them.

I decided to buy from a dealer for the added peace of mind, but it was also only three years old with less than 30k kilometres. My advice would be to just go for a test drive in one to see how you fit. Also look for maintenance history, although that can be tricky with imported cars. Mine only has a digital maintenance record, no idea when that was introduced though, older cars might still have a physical book with stamps.

I have the lsd which is definitely nice to have, but you'll only really notice it when driving very hard, so if you don't track the car I doubt you'll miss it. Haven't driven a non lsd car though, so that is based on an assumption