I just bought M2TW...

[Lysimachos]

I have the opinion that the M2TW-engine is clearly superior to RTW, if only for moddable AI. There is however no mod for it (yet) that can compare to EB in depth and historical detail, but there are mods which are different, but not necessarily worse. One that I really like is Broken Crescent. It turns away from the euro-centric main campaign concept (which most major mods use and which I find a bit boring: despite all those things that SS, DLV and the like change it still feels kind of vanilla to me) and has great graphics and music which make for an enthralling atmosphere. It does sacrifice a bit of historical accuracy for gameplay though, so be warned
I haven't tried TA yet, so I can't say anything about that.

Edit: Did I mention that I expect to see the best mod of all times to be released for M2TW some day? I think it's called Europa Barbarorum II or something