95, 96, 97, 98, 99 Diesels for reliability, ease of maintenance

Hi:
I keep thinking about a diesel, and the above years look appealing to me.

What is your opinion about which years are the better Diesel? Not so much in terms of looks or driving pleasure, but in terms of reliability and maintenance expense.

Is the 95 better in this regard than the 97 or the 99?

Is the 98 or 99 better because of the 174 hp?

Thanks in advance for taking the time to express your opinion.

Happy Holidays and have a great New Year.

Dave