I haven't decided yet. I have The Sword and the Flame, Triumph and Tragedy, In the Heart of Africa, General Glen's Western Showdown and Science versus Pluck. I like bits and pieces of all of them, so will eventually end up changing things to suit myself (like any good gamer).
Basically, I plan to mount my figures individually. So I'm seeking something that looks right and has roughly the right men per space ratio. Should the Mahdists be able to put as many men in the same space as a shoulder to shoulder line, or did they need more room?
That way, when it comes to hand to hand combat, the Mahdists will have roughly the same number of opponents as they would have historically, and things will work out. Plus, they'll look good in photos.