Matt, the DPF's aren't the problem they were a few years back. The turbo diesel modern engines are developing very quickly with new tech coming into them every year or so.
The new passat diesel. 5.7l/100km,125kw & 350nm. 0-100 in 8.6sec.
Will leave any of those cars for dead, in any category, except outright purchase cost........though in value for money it wins by far. Standard equipment is miles ahead and the build quality and safety is by far best in class. You might pay 3-5k more but it's got more than that in value.
For a cheap diesel the i30 is a winner.
Mondeo is ok too but is just a i30 rolled in sprinkles.