The Companion to the Roman Army is pretty good by looking at the preview, but I looked up it's price on Amazon.com. A mind blowing $140. I can't see how it could be worth spending that much. The book I mentioned when I started this thread gave just as much, if not more detailed information about the early kingdom and early republic. It's only 200 pages less, but per-page it fits much more information, and for only $20 at borders.

If the book wasn't so damn expensive I'd probably go and pick it up. Good suggestion though. I'll check out the others you guys mentioned on Carthage and the Gauls.