well when I first started FFXI I was just like you, I was really drawn to the DRK class for the exact same reasons but after obtaining it I wasnt really that impressed as I was with say the DRG class, still if you do go with DRK there is 3 types of sub I would recomend, RNG (ranger) from 1-30 is good as it will give you a nice acc boost (DRK are notorious for missing alot) and I hear (although iv never tried it myself) that THF is one of the best from 40+ and lastly I would recomend BLM since you want to be versitile with you DD this would suit you perfectly.

My opinion may be outdated as I havent played FFXI for ages.