I've looked at the TA11, TA31, Aimpoint, EoTech 552, and Leupold CQT. Of the different sights, the TA11 was my favorite general purpose sight. It is a great day/evening sight that can still be used as an effective CQB sight.
However, there were a few things to keep in mind about the sight. First, it is well-designed but still a rifle scope. Even with the generous eye relief, the ACOG doesn't offer the flexibility of firing positions that the Aimpoint or Eotech do.
It isn't parallax-free like the Aimpoint and Eotech and doing weak side transitions (for firing around cover) or firing from less than optimum eye relief will result in minor variations in the point of impact.
Also, the TA11 relies on tritium and fiber optic to self-adjust the brightness. Under some lighting conditions, the donut can be too bright and will blur into a 4 MOA dot.
The range hashmarks on the reticle are also tiny and difficult to see. For moving targets or fast acquisition, they are useless (then again, how many people are going to try a 400yd shot on a moving target?).
The TA11 is also big when compared to the almost identical (performance-wise) TA31. All that extra size buys you is a better exit pupil (although the TA31 is already at the maximum limit the human eye can use) and another inch of eye relief. For less cost and less weight, the TA31 offers a little more magnification, a more compact package and a better field of view at the expense of some eye relief.
Having said that, I'm interested in buying the same TA11 that was mentioned to you in the TF thread, so I had to dig hard to think up every negative aspect I could about them.
Under 200, I think the Aimpoint and Eotech are faster and quite tough. They are also better suited to most competitive and defensive/CQB shooting.
However, if I could only have one scope to serve every purpose, I'd go with the TA11 or TA31 (depending on how much issues such as size and eye relief are important to you) because if you can't acquire the target, your chances of hitting it drop significantly.