'Brink of Battle' has had a positive response on here from various quarters; not seen them myself but I think the rules are adaptable to a whole range of periods, and apparently work very well.
Incidentally, you won't regret getting BF&S, I got my copy at Salute, fantastic. Lovely figures too, which I have yet to start painting, but yes, well worth getting (only thing was, having spent at Salute, I couldn't really justify getting in on the kickstarter!)