My artie currently has the Tinkerer's set and Elocator's Habiliment, which gives a lot of displacement for a 20th level artie.
But I'm thinking about doing the entire Purple Dragon armor/gloves/helm trio b/c it gives +3 to hit/dam, 9 con (and 9 str which actually will increase my AC b/c I'm carrying so many clickies) plus the Druid boots and goggles (for the insightful Dex and seeker +6 plus the Drow Piwafwi (to make up for the Tinkerer's sneak attack +5/+8).
But, wow, that displacement is super nice and keeps me alive in these epic quests. I am loathe to give it up - what do you think? (I have one GS hp item displacement clickie and was thinking of making another, too).