If you don't need a hammer poll, and you like Cold Steel's offerings, you might go for their Frontier Hawk. I prefer it over the Rifleman. It's light, has a lot more cutting edge than the Trail Hawk, and usually retails on eBay, etc. for a few bucks less. (The Trail Hawk is, I think, maybe a shade lighter than the Frontier, but it gets that way, notwithstanding having a small hammer poll, by being much narrower.) If you go with either the Trail Hawk or the Frontier, you'll want to reprofile the edge, and (if you're like me, and like a little-more-classic look) lose the paint finish for something a bit more rustic, but you'll end up with a pretty light hatchet for not too much cash. Easily backpacked. You might also think about losing some of the handle length, though you might first want to see how the lighter weight alters your chopping performance--you might end up happy with the extra handle length.
As said above, the Cold Steel Rifleman is a very heavy tomahawk; the others by CS are not so, but are generally pretty light.