. I've already ordered Antietam. You get 1st and 2nd Bull Run with it. I have the BG version of Bull Run (somewhere) and I really enjoyed it. So Antietam sounds like a very good deal with lots of maps and variations.
I've managed to force my family to visit Antietam during a near by vacation so I know the terrain a little. I only had a day but got a pretty good ranger tour that covered The Corn Field, Sunken Road and Burnside Bridge.
I would be happy to play any size peninsular battle, so take your pick. Savage Station is one that I have not looked at much, if you want some kind of suggestion. I enjoy the small short ones as much as the big long ones. Untangling the units and getting them all on the right road really gives you a since of sympathy for the commanders, and makes all the botched deployments more forgivable.
Mostly I'm just tired of knowing what the AI is going to do ahead of time.