I travel 15k a year just going to work on average, and until last year was quite happily trundling around in a 55plate Passat 130PD. It was a great estate, and nearly never let me down. Maintenance on it was fairly painless as I'm not bad with the spanners, but it did start to become more expensive to run as mileage increased, and cost in general was going up. So I decided to part with it.
This took me down much the same route in terms of my thinking, and ended up looking at smaller hatches of which diesel was the first place I went. Averaged similar mpg to the Passat, £30 tax I think it was, reliable, comfy at motorway speeds, I tried a few different varieties and was looking at an all singing and dancing mk7 GTD. 15 plate for sub 14k which was a big draw as well.
I ended up with the GTI PP.
Sure it doesn't do as many MPG's, but it's just as versatile and puts a larger grin on my face that I think the GTD ever could, especially when I get the LSD to kick in.
Do I think diesel is dead, far from it. I do think petrol will start having a resurgence though.