I've run a Githzerai PsyWar/Monk/Lucid Cenobite (a PrCl from Hyperconscious) and really liked it. He was a Dex & Wis build using a Polearm & the various feats that play off of Combat Reflexes.
Regardless of your build preferences, your psionic power choices can make a huge difference in the PC. Expansion is virtually a no-brainer. Inertial Armor (if you don't have it as a psi-like ability) is also quality, since it gives you a +4AC boost with a duration measured in hours.
Fist of Zuoken, if you can't use Hyperconscious, is a nice PrCl that gives you continued progression in your psionic abilities.
If you play a Kalashtar, take a look at the Atavist class, which works with Soulknife or Monk PCs- its unclear what happens if your PC has
both classes, though.
Take Monastic Training, one of the other feats, or one of the Monk variants that lets you freely multiclass with Monk & another class.
There are also a lot of feats out there that let you use other weapons as Monk weapons. Depending upon your choice, that could be quite a boon. Pole Master/Pole Fighter (same basic feat, 2 different sources) lets you do that with a polearm- FoB at 10' Reach is pretty fun.
Ring the Golden Bell from DCv1 lets you use your PC's unarmed strikes at range, including any attack he could normally deliver by touch, like a held spell/power or a use of stunning fist.
You might also find this thread helpful:
http://www.enworld.org/showthread.php?t=221182