I reckon Klaus is on the money here... and solely because he was one of the few people to actually restrict himself to core rules
I've been eyeing off a similar character for a future game....
I'd take Stunning Fist (bonus) and Improved Grapple as your 1st level feats, Combat Reflexes at 2nd level, Exotic Weapon Proficiency (spiked chain) for 3rd, and Improved Disarm or Improved Trip (whatever floats your boat) for your 6th level bonus feat, and maybe Power Attack. That'll give you a fair array of options - reach, multiple AOOs, grappling, stunning, good disarm or trip chances. Particularly in a large party, you can concentrate on interfering with other combatants rather than straight damage.
Oh, and get friendly with your sorceror/wizard with Enlarge Person...
My only criticism of Klaus' suggestions is that some DMs won't allow feats from the MM, even though Improved Natural Attack and Special Ability Focus seem tailor made for monks.

I've been eyeing off a similar character for a future game....
I'd take Stunning Fist (bonus) and Improved Grapple as your 1st level feats, Combat Reflexes at 2nd level, Exotic Weapon Proficiency (spiked chain) for 3rd, and Improved Disarm or Improved Trip (whatever floats your boat) for your 6th level bonus feat, and maybe Power Attack. That'll give you a fair array of options - reach, multiple AOOs, grappling, stunning, good disarm or trip chances. Particularly in a large party, you can concentrate on interfering with other combatants rather than straight damage.
Oh, and get friendly with your sorceror/wizard with Enlarge Person...
My only criticism of Klaus' suggestions is that some DMs won't allow feats from the MM, even though Improved Natural Attack and Special Ability Focus seem tailor made for monks.