The boxed armies were a good idea, but now with the unit packs, I think you can mix and match what you want even better. I had suggested to Thom to make something similar to a Chinese buffet menu for the Blackbloods and Devout. Where you could take something from column A, B and so on, and mix and match what you want. I guess the unit packs are doing this already.
@Fallen--I'm definitely goin' with some Hunting Spiders and building a 1000 point force around them soon. I would suggest crunchin' the points, then givin' EE a call and they'll give you a price for whatever size army you're building. They're polite and easy to work with.