I am now considering my options as far as tier is concerned. I have heard mixed opinions some suggesting the 4 t10 is worthy others that the set bonus is really nothing special and to consider the non set badge pieces.
If your choice is between that badge chest and the T10 chest, even if it's 251. The bonus would make the Tier piece out-weigh the "small" stat increase, along with the legs.
If you use your Holy spec often, you may want to consider getting the Helm, Gloves, Legs and Shoulders and the Haste/Crit badge or Princes25 chest (they will be PuGable soon, if not already).
Make sure you keep two pieces of T9, since that (2) bonus can be good for some fights. I've probably given more to think about than an answer you were looking for though :/
If the calculation for Disc 4pc is still done the same as it appears to be on the PTR it's worth roughly 350 SP with a raid buffed SP of 3700. You're going to be a good bit under that from what it looks like from your Armory meaning it's going to be worth less than 350 SP for you.
First let me ask you: do you plan on raiding content to get 264 Tier T10? If yes, then it's probably worth the pickup.
If you're probably only going to be seeing 251 Tier T10 for the foreseeable future: grab the non tier badge.
More info on how the set bonuses work out can be found Here