Super AC characters are fun, I've got one in the campaign I'm running, but I already finalized the character and submitted him.

Thanks everyone for you help. Here's what he ended up looking like.
((FYI, the DM houseruled the psychic warrior in a couple of places))
Celthin of Duskhollow, Human Psychic Warrior 20, Planar Champion 5
HD 20d8+5d10+125
Spd 60
Init: +5 (Dex)
AC 54 (+15 armor, +8 animated shield, +3 dex, +5 natural, +5 deflection, +5 insight, +3 luck)
ATK: +52 melee (+23 base, +13 str, +3 luck, +5 competence, +7 feats)
DMG: flamberge 2d6+23 +1d6 screaming +2d6 holy (13 str, +1 enhancement, +2 impact, +7 feats)
SA: favored plane: The Abyss +2, Nine Hells of Baator +1; see invisibility at will (and see ethereal), attack ethreal, planar survival, psionics
SV: Fort +24, Ref +18, Will +19
Str 37, Dex 20, Con 20, Int 10, Wis 10, Cha 10
Skills: TBD
Feats: Way of the Lion, Power Attack, Weapon Focus: Flamberge, Two-Handed Power Strike, Psionic Weapon, Deep Impact, Weapon Specialization: Flamberge, Frenzied Attack, Improved Critical: Flamberge, Akodo's Technique, Improved Weapon Focus, Expanded Critical, The Final Lesson, Power Critical, Cleave, Bonded Weapon: Flamberge, Great Critical, Epic Weapon Focus: Flamberge, Epic Weapon Specialization: Flamberge
Items:
belt of giant strength +6
articulated dragonscale armor +5 of heavy fortification
gauntlet of rusting grasp
amulet of natural armor +5
helm of alacrity +5
animated dragonscale shield +5
manual of gainful excercise +5
psychoactive skin of the hero
3 dull grey ioun stones
pale green prism ioun stone +5 (painted dull grey)
3x5 carpet of flying
arm of nyr
mantle of warding
screaming, keen, holy flamberge +1 mindfeeder/bodyfeeder, of impact
ring of epic psionics V
armband of health +6
ring of fire immunity
vest of resistence +5
boots of swiftness
portable hole
0- catfall, float, detect psionics, burst, lesser metaphysical body
1- chrysalis, call weaponry, feel light, ectogoo, bite of the wolf
2- animal affinity, expansion, reach
3- claws of the vampire, displacement, improved biofeedback, prowess, psychokinetic blast
4- inertial barrier, polymorph self, dimension door, telekinesis, dissolving touch
5- dimension strike, graft weapon, energy barrier, adamant grasp, ectoplasmic armor
6- ablating, greater metaphysical weapon, improved psychofeedback, shield of prudence
Constant Spell Effects: mind blank, freedom of movement, energy immunity: fire
Possible Pre-Battle Buffs: ablating, greater metaphysical weapon, improved psychofeedback, graft weapon, inertial barrier, claws of the vampire, displacement, improved biofeedback, animal affinity (str/con), chrysalis, expansion, reach, haste (from boots)
1x get out of jail free card vs negate psionics, +5 enhancement bonus to weapon, +1 to hit and ability to manifest claws of vampire on weapon, DR 10/+5, regen damage inflicted, 50% miss chance, first 26 points of damage that get through DR are subdual, +1d4+1 str/con, DR 5/-, +5 str weapon damage to 2d8, reach, haste
Could have him looking something like--
HD 20d8+5d10+175
AC 58 +displaced
ATK +62
DMG 2d8+3d6+49 (when taking a full attack action with two handed power strike)
DR 10/+5, DR 5/--, 26/Subdual
SA: favored plane: The Abyss +2, Nine Hells of Baator +1; see invisibility at will (and see ethereal), attack ethreal, planar survival, psionics
SQ: immune to mind affecting, divinations, slow, paralysis, entangle, fire, sneak attacks, critical hits, spell turning (6 levels)
--if he gets enough time to prepare.
Sound good?