Personally, I would do it. I can tell you are wanting to so bad you can't stand it anyway.
As for the rarity of the truck, so what? I don't know much about diesels and don't really care to. I'm a gas and carburetor man myself. If I was needing something to tow heavy loads with I would probably consider one but I don't have the need for it. I don't tow with my truck and surely don't plan on it. I can tell you are just wanting a good daily driver and I think you would be way ahead of the game with the conversion. I would do it and never look back. Just my nickels worth to you delima.