since I'm trying the Psionic Build, is it a bit too much to tack on the Advanced Template to him for a +1 LA?
It basically increases natural armor by +2 and +4 to all ability scores for a one level trade off.
What template? I don't know of a template like this.
If you want a template, consider Phrenic. Phrenic is pretty badass.
The advanced template is a Pathfinder Template.
http://www.d20pfsrd.com/bestiary/monster-listings/templates/advanced-creatureAs of right now though, I'm building him as though he were a human, which gives him 21 feats with a two level dip in Monk and that's not including Improved Unarmed Strike and either Stunning Fist, Elemental Fist, Touch of Serenity, or Punishing Kick, depending on which Alt Class or Archetype I choose.
Feat choice is also MUCH easier since a PF Psychic Warrior has Psionic Proficiency, which allows them to use their Psychic Warrior level in place of their PW BAB to determine what psionic feats they qualify for. i.e. a Monk2/Psychic Warrior 5 would have an effective BAB of +6 for psionic feat selection, instead of +4.
I went to compare the two different PWs based on what is on the 3.5 SRD and what's in Psionics Unleashed, the PW got some MAJOR boosts it seems.
The "Required" Feats I've figured out thus far: (I say "Required" loosely, but they seem to fit well.)
Monastic Training (Human Most Likely)
Tashalatora (Take-able at Level 2 with Pathfinder Skill Changes)
Improved Grapple (Easy Monk Feat)
Greater Grapple
Scorpion's Grasp
Superior Unarmed Strike
Psionic Fist (Maybe)
Greater Psionic Fist (Maybe)