What strikes me is that at this point, your polearm using, javalin throwing monk isn't making use of the signature monk ability of beating people up with his fists, which is the main reason people seem to want to play a monk...
I have never thought of Monks as merely unarmed combatants. Many of the iconic martial artists mix unarmed and armed techniques: Bruce Lee had his nunchuks; Shaolin Monks use swords, spears, halbards, staves, etc.; Jackie Chan uses anything within reach.
Some say Steven Segal can kill you with a hoagie.
So I mix as well- sure he's got the polearm, but what happens when someone closes? Well, unlike more conventional polearm builds, I don't bother with armor spikes (can't use 'em), Short Haft or similar feats, or switch weapons when foes close- I've got a scaling US that does similar damage.
Ditto if my weapon is disarmed, thrown (if I'm using a spear or Greatspear) or if the battlespace is too confined for using a polearm- about the only thing I've lost is Reach.*
That's because the Combat Reflexes feat tree isn't weapon specific- I still get all my AoOs and the like- its just that Reach makes that whole tree more effective.
Of course, you could always take feats that increase your natural reach instead of being a polearm monk and play essentially the same PC as an unarmed constant- a D&D version of Dhalsim from Street Fighter.
* I have 2 different kinds of poearm-using Monk/Kensais: those whose chosen weapon is US and those whose weapon is the polearm. The former sacrifice weapon damage for being an equal threat without it; the second has a nasty weapon with a significant power drop when not using his weapon. Both have their plusses and minuses.