Looking to buy my first H1. What do I look out for?

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I have really been trying to get a good idea what year has got the best track record over all. It seems most have had there problems as any truck would. I would like to know if any stand out as problem years to stay away from. Also, I here alot about maintanace. Are they really that much work to keep running? I do most of the work on my current vehicles but know very little about H1's maint. schedules. Also this will be my first diesel. Anyway, I would appreciate any help or advice. Also,how do I sell my wife on a diesel? She hates them...at least when we are behind one.