Some of the nicest Civil War figures out there are the Britians Swoppets.  The figures had inter-changable parts so you could put together a large assortment of different poses.  They were colorful and the flags carried by the figures were fantastic.  If you had the money - they were rather pricey for toys - you could get Calvary, Artillery and Infantry units.

I was fortunate to find these as we were driving through Kentucky on our way to Florida on a family vacation.  You know, they are still rather pricey!