I don't think any other company does armored figures and robots like 3A. They're just in a league of their own.
Case in point, the soon-to-be-released Spartan MkV Commando. If someone told me that this was the 1:1 suit for a live-action HALO movie, I'd be inclined to believe them, that's how good this figure looks.
3A stuff isn't always easy to find state-side, but if you do locate one, you can expect to pay somewhere around $300 for him. And you better start looking now, because he just started hitting the market.