I have only had my 2001 TD5 a month and I love it, they make great all round family transport. I did spend some time looking for a good 300tdi but gave up as all the ones I looked at leaked and were full of rust although I am told that some good ones are out there, jusy got to find them.
I just hope I will be saying 'I love it ' in a year or so's time.
I did my first long trip trip yesterday 150 miles or so and it was a breeze, very comfy, quiet and all in all enjoyable.

Hope you find the right one, good luck.