Re: 1.9 or 2.4
I've not long bought a 2.4 JTD after getting gazumped on a 1.9 JTD. After being driven in both, the 2.4 is quicker, but don't expect the same great fuel consumption as the 1.9. I'm getting about 38mpg at the moment, but that should increase to about 42mpg now that I've replaced a broken thermostat. You may also want to take into account the difference in insurance, group 13 for the 1.9 and 16 for the 2.4, or like me you may not care. One thing I can tell you is that the 2.4 definitely sounds a lot better than the 1.9. I was very, very impressed with how good the 5 cylinder sounds.
I reckon you'll be happy with either.