All of the models in my AWI collection are Perry. I actually bought most of the models YEARS ago. At the time, they were the only ones featuring the British in campaign gear for the southern theater.
As far as rules go, I don't have a single set in mind. I designed the collection to be as flexible as possible so I can use them for actions representing scales from 1:5 to 1:40-ish. The separate command stands gives me the ability to make units of 2-8 (or more) stands. In the fact, the American stands in particular have been designed to be mixed.
My initial goal is twelve stands of (mostly) uniformed Continentals and twenty stands of militia. Several of the militia stands have uniformed models cunningly placed so that when set against a uniformed stand it presents a smooth transition visually. The Continentals also have the odd model in civilian dress. The American battalions were reformed between nearly every battle in the southern theater and would rarely present a uniform appearance. Although, I am build twelve uniformed stands, I have the ability to combine the entire collection into different combinations to fit the scenario. Generically, my Continentals will carry stars and stripes flags while the militia carry the more rustic slogan banners.
Back to rules. I increasingly find myself unwilling to learn new rules. I have found I have the ability to write my own, at least for my own game table. I will probably use a variant of Republic to Empire or the new set we are working on. I will also use Donnybrook for skirmish games (notice the cavalry are based singly). As far as other sets, I have a fondness for Piquet and an unpublished rule set by Bryan Ansell simply called Horse & Musket
. The later are centered on the SYW and incomplete, but the core is there and I feel confident in my ability to 'finish' them once I get enough models together for a game. British Grenadier and Black Powder Rebellion! are also interesting, if only for all of the period information they have.
I haven't yet tried any of the Osprey rules...