With BWL coming up, what is the best DKP system out there?

My guild have been using rolls +1/+1 for loot in MC up until this point, but we are planning on switching to DKP once BWL gets released. There are several ways of handling DKP. You can have a decay on DKP to prevent hoarding. You can have a min/max price on items. You can bid for items or have fixed prices. There are lots of ways to do this. What is the best way in your experience? Would like a fair system and avoid loot drama. Thanks!