After taking a quick look at some estimated numbers, I'll be buying the SSO neck and shield tonight (maybe tomorrow) with the idea that where I'm losing some straight avoidance on the neck, I'll make it up with the shield. Keeping uncrit/uncrush and gaining the stam and expertise. Check your own numbers to be sure that you're not losing too much before getting any new piece of gear!
The threat isn't as big a deal in my mind as keeping down the number of parries (especially early) in a boss fight. Getting 3 or 4 parries in a row on Price would, like, suck. A lot. ;p
I'm also thinking that the neck will be the only expertise item I'm likely to gear. So spending the itemization points there makes sense to me. And, really, in the end the expertise is a far secondary concern to the very nice stam on the thing!
Probably switch it out for trash mobs for a spell damage neck. But for bosses, this looks like an excellent tanking neck.