Well let me know how you're going to divide things up. I'm guessing Zook would take the Vest and the arrows (as he's the only one who uses a bow). As far as the amulet and ioun stone are concerned... Kolarred and Luthal can divide them up as they see fit (although Bobitron sounds as though he doesn't want either of them).
Kolarred, the pressence of the ioun stone actually would probably not cause too much of a sitr to your credibility, because they are well-known around Khorvaire as magical assistant devices. You might even gain credibility in some cases because you are seen as a paladin powerful enough to own your own ioun stone. As the stone can be taken on and off whenever you want, if you do feel weird in social situations you can always not have in in place normally, but only put it in orbit once combat starts (using or removing the stone is a standard action).