Logon to both routers and do a show hard, capture the output.
that will indicate whats installed in each device. Post it here.
Your 2 criteria need some amplification.
1. 200 concurrent users doing what? browsing? hitting multiple apps? you would need to know what kind of apps also.
there are some that have been developed in LAN environments that suffer on any kind of wan.
2. Are you referring to multilink ? If so, I would suggest considering some alternatives, for example in the US, depending on where you are, its more cost effective (and easier) to go with a sub-rate ds-3 instead of mulitlink with t-1's. I have never been a big fan of multilink, I don't see a clear performance gain.
