Keep in mind - Each missed ufo is also two panic! (and you need to edit the exe to do it)
Xcom nexus is already live, and has all of 9 mods, but most of them are exe edits (and thus not compatible without manual effort). Its not really that much manual effort, granted.
The biggest thing for me was that recruited soldiers have more hp than the ones you start with. At the moment I am pretty sure its a bug, but its really annoying.
Anyway, on the subject of xcom - I am really interested in trying out the original xcom. Is it worth trying to get it, and playing the original? Or is there a faithful remake somewhere I should play?