Thanks for the recommendations everyone. I forgot the MeG was doing a renaissance version. I have the ancient set so will look into that. The guys I game with are a bit uneven about those rules but I really liked them a lot.
I put my hands on the free version of Tercios and it looks intriguing. Does anyone know where I can put my hands on a set of order cards without having to sign up for scribd? (I can sign up for scribd, but I get so tired of signing up for stuff....)
A friend here has pike and shot, so I have three of these to try.