Re: dark side or not
From what I hear, the 1.9 will give you slightly better fuel consumption than the 2.4. I'm currently going through exactly the same dilemma myself and I've decided to plump for the 1.9 JTD Multijet. It's lighter and more manoeuvreable than the 2.4, you can fit a Q2 diff for £500 to make it even more fun, and you can easily have it remapped to 180bhp with loads of torque at your disposal.
Yes, I reckon your suspension stuff will go on too, the weight is similar enough to your old V6.