ones that are comfortable for you! everyones foot/ankle is different and every boot is different so find the one that matches you best. it seemed like the 32 lashed were very popular and those are the ones that fit me great as well. might be a model to look into as they may have good universal fit.
id also recommend looking into replacement soles for arch support! imo your boots are the most important part of your setup, so dont skimp!