Set-up is very important and very under-rated. A well-set-up budget TT can outperform a poorly set-up unit at 10x the price. So you might want to buy from a local, maybe a dealer, who can do proper set-up.
One more word: there are lots of people who think they can set-up a TT who really can't.
One more word: there are lots of people who think they can set-up a TT who really can't.