Over the last few years I have collected a variety of different rules publications. I had used Warhammer Ancients as the staple for quite some time having spent long afternoons and evenings playing the fantasy variant. I have copies of Poleaxed (Lance & Longbow), Bloody Barons (Peter Pig), Warhammer Ancients (Games Workshop), Medieval Warfare (Terry Gore), and finally I picked up a copy of Hail Caesar at Salute earlier this year.
I am currently basing my orbats for the Battle of Bosworth Field on the Medieval Warfare Supplement although with some slight modifications they'll fit nicely into Poleaxed. Of course it will be some time before I have a chance to play them.