Rebel Minis, but originally a Two Hour Wargames product, I believe they will be the rules of choice. While they call for twenty figure units, I think they will work fine with the fifteen figure units I am organizing. Having played some of the other Two Hours offerings, I like their reaction and reputation driven rules. Of course, rules are always open to change!
As for bases, Litko used to be my go to company as they make high quality bases in a huge variety of shapes and sizes. But lately I have been looking for a more affordable alternative, and Warbases offers just that. I can still buy the sizes and thickness to match my Litko stash, but the pricing is noticeably less expensive, even with the shipping from overseas (they are a UK based company). So, I have ordered a slew of round bases, and some movement trays for both mob and formed units.