I'm sure the GTD's a cracking car but I didn't buy one
(a) because it's a diesel and, therefore, is a tractor (the wife's car is a diesel so I do know!!!)
(b) because I was having a mid-life crisis and a GTD just doesn't pull the heart strings like a GTi does
(c) the two GT TDi Mk4s I had were the most unreliable cars I've ever owned. By a country mile. So I'm very very suspicious of VW diesels
(d) and, er, the GTD didn't turn up at the dealers until the time I was picking my GTi up last July. So I couldn't have bought one anyway.
Suffice to say I have absolutely NO regrets whatsoever about buying the GTi, despite my doing a 60 mile a day commute.