I got Wrath of Unchaining (397) last night. Although it has no passive benefits, it is an awesome trinket. On target dummy testing last night with no raid haste buff, it fully stacked in about 6 to 7s with an AS focus dump cycle and about the same with a AI focus dump cycle during RF. Hence, as long as you do not go more than 10s without attacking, its uptime is nearly 100%.
So this prompted me to do a quick trinket analysis for 4.3, with including all 378 plus trinkets. For proc trinkets I used a rough uptime equal to that modeled in FD. I also used the data from WoWHead, so it may not be 100% correct.
Since agility is our primary stat, I ordered the trinkets first on average agility. Then within an agility band, I made a rough guess at the order on the other effect.
| Trinket | iLvl | Passive | Dynamic | Dynamic Avg | Type |
| Wrath of Unchaining | 416 | N/A | 990 Agi | 990 Agi | Proc |
| Wrath of Unchaining | 403 | N/A | 880 Agi | 880 Agi | Proc |
| Wrath of Unchaining | 390 | N/A | 780 Agi | 780 Agi | Proc |
| Starcatcher Compass | 410 | 517 Agi | 3278 Haste | 820 Haste | Proc |
| Kiroptyric Sigil | 410 | 517 Haste | 2585 Agi | 517 Agi | Use |
| Vial of Shadows | 410 | 517 Agi | Damage | N/A | Proc |
| Starcatcher Compass | 397 | 458 Agi | 2904 Haste | 726 Haste | Proc |
| Matrix Restabilizer | 397 | 458 Agi | 1834 Stat* | 524 Stat* | Proc |
| Kiroptyric Sigil | 397 | 458 Haste | 2290 Agi | 458 Agi | Use |
| Vial of Shadows | 397 | 458 Agi | Damage | N/A | Proc |
| The Hungerer | 391 | 433 Agi | 1730 Haste | 433 Haste | Proc |
| Starcatcher Compass | 384 | 406 Agi | 2573 Haste | 643 Haste | Proc |
| Matrix Restabilizer | 384 | 406 Agi | 1624 Stat* | 464 Stat* | Proc |
| Kiroptyric Sigil | 384 | 406 Haste | 2029 Agi | 406 Agi | Use |
| Vial of Shadows | 384 | 406 Agi | Damage | N/A | Proc |
| The Hungerer | 378 | 383 Agi | 1532 Haste | 383 Haste | Proc |
| Arrow of Time | 378 | 383 Agi | 1149 Haste | 287 Haste | Proc |
| Ancient Petrified Seed | 378 | 383 Mastery | 1277 Agi | 319 Agi | Use |
* Stat is crit, haste, or mastery depending on which you have the highest rating for at the time of proc.
Of all the 378 trinkets available, Ancient Petrified Seed loses out since it has by far the least average agility and since its other stat is mastery, which is by a small amount our worst secondary stat. However, a well timed use of the full agility proc could move the trinket ahead of the other 378 trinkets. Of the remaining two trinkets, The Hungerer wins over the heroic dungeon trinket since they have the same passive agility but The Hungerer has a higher total and average haste proc.
Of all the 384 trinkets, Wrath of Unchaining wins out by a large margin since it is actually a half tier in ilevel higher at 390. Including buffs, the 780 agility is worth 1888 AP and 2.4% crit. That is 374 more agility than the other 384 trinkets. It dominates just like the other agility stacking trinket Fluid Death did at the start of Cataclysm with beating out a lot of 372 trinkets although it was ilevel 359. Since I do not have a good feel for how good the damage from Vial of Shadows is, I have arbitrarily set it at the bottom of the list, although it could just as easily be the next best after Wrath. Of the remaining 3 trinkets, haste is the other stat. Going by average haste, I ordered them in descending order the Starcatcher Compass, Matrix Restabilizer, and Kiroptyric Sigil. Note though that well timed use of the agility on the Sigil can potentially move it up the list some.
The same ordering applies to the 397 and 410 ilevel trinkets as for the 384 ilevel trinkets, except that a 410 version of Matrix does not exist.
The heroic version of The Hungerer slides in between the 384 and 397 groups, but could possibly be caught by the Compass due to its large amount of average haste.
The 397 version of Wrath is worth 2130 AP and 2.7% crit.
The 410 version of Wrath is worth 2396 AP and 3.05% crit.
FD shows the 397 version as about a 780 DPS gain over either of my current trinkets (H The Hungerer and Matrix).
Note that the 390 version of Wrath may be lower rated than the 410 trinkets, but the 403 version is definitely better, or at least good enough to be one of your 2 trinkets.