Buying a new diesel truck

I’ve never owned a diesel before I’ve only owned a 2009 Silverado 1500, but I’m looking into buying a v8 diesel and I can’t decide what to get so far the ones I’ve liked the most look wise are the 5th gen ram 2500 Laramies, the 4th gen f250 king ranch, platinum, and limiteds, the 3rd gen Silverado 2500 high country, and the 4th and 5th gen sierra 2500 denalis, which do yall think is the most reliable of all those