If your looking for more AC and lower weight, do what I did, get a Kobold Jesters Crown. As usual the best monk gear is the all/all gear =). Most monks with a full suit of planar gear keep a good portion in the bank. The only reason I keep the Tranixx around is for caster mobs, but if I get circlet of Tallon I doubt I'll give up 5 ac 9 cold/pois difference for 11 magic.
Boo 9ac, rest of stats are decent but not worth ditching the 3 - 4ac from frog crown or trannix crown. Only reason I'd ever do this quest is to lower my weight.