My eldest nephew asked to play a battle of Hastings game so in record time we put away the Napoleonic game and set up appropriate terrain and laid out the armies. I put together the troops based on an infantry unit roughly being 800 - 1000 strong as standard, getting my figures from the Osprey Campaign series book. I checked quickly with the Hail Caesar army list 2 to ensure I had it balanced, which it roughly was.
For this game I did not worry about number of figures in a unit because my base sizes vary quite a bit having amassed my collection over time buying from many different sources. I instead focused on ensuring everyone had the right size frontage, a nice mechanism in the Hail Caesar rules.
You can see the troops lists and more photos plus how the game went on my blog:
http://thewargamingmegalomaniac.blogspot.co.uk/2012/11/hail-caesar-battle-of-hastings-1066.html