That spirit trinket is rather terrible, unless you need to maximize your spirit to be a mana battery for your 25-man raid. For anything else, you'll be better off with int trinkets. And except for Horridon's trinket, any other trinket procs or on-use effects in ToT are universally terrible for us and/or generally not so brilliant.
The Shado-Pan healer trinket is really nice, and I personally use it to complement my Darkmoon Card or my Spirits of the Sun (which are both equal in regards to int and regen in the versions that I own, so it depends on fight length which one turns out to be better... and I mostly use the Darkmoon Card because it's less dependent on fight length in regards to its internal CD).
In the end, I'm planning to wear Shado-Pan + Horridon's, unless Blizz provides us with a better alternative to STotSP. I'm not yet factoring in high-end heroic items such as the one from Lei Shen on heroic... because that one's too far out of reach yet.