I also am awaiting the reprint of D-Day at Omaha Beach. Per some marketing people at Decision games that I recently had contact with, they indicated it was set for a June-ish release, and that it would have a mounted game board.
While I have not tried them, there are other games in the D-Day series—Tarawa and Pelilieu. i cannot vouch for any of the D-Day games, but they all seem to enjoy rather large ratings on BGG and good word of mouth.
I can, though, recommend the designer, John Butterfield. One of the Giants in the field of Wargamming, in my opinion. He was also the designer of Enemy Action: Ardennes that @Juan_Raigada mentioned (another game I haven’t yet played.
If you’re open to Wargames dealing with Air power, I cannot recommend strongly enough RAF: Battle of Britain 1940. Another Butterfield design. Since I put it on my table in late January, it hasn’t come off. It’s actually 3 games in one…Lion, which is the Solo game where you play the RAF vs the Germans…Eagle, where it’s the reverse, you play the Luftwaffe vs the RAF…and Lion vs Eagle, which is 2-player. Playing the complete BoB scenario can take upwards of 15 hours to complete, but it’s a wonderful 15 hours.
I would also recommend Zulus on the Ramparts and Ottoman Sunset. Both are State of Siege games in the same series as Dawn of the Zeds, but deal with. obviously, different themes. Zulus is about the battle at Rorke’s Drift in 1879, which is most widely known today as the battle depicted in the movie Zulu. Ottoman deals with the Ottoman Empire’s dealings in WW I. I personally prefer Zulus better, as I think there are more player decisions/actions to make, and therefore the player can have more impact on the outcome, but others here will tell you that Ottoman Sunset is much better.
I’ve just bought and set up Comancheria, and am partly through the tutorial. Got this based on @tomchick recommendation. Don’t really have a full opinion on it thus far, but so far, I like what I see. A bit of a different kind of Wargame.
Tony