Between RAT and Becker, it's a tough choice to make: you can't go wrong with either one. Both are tough as nails (maybe tougher), both use 1095 steel, both have very good heat treatments, and both have very good warrantees, with the edge on warrantees going slightly to RAT. Yes, I know that Becker's warrantee isn't as explicitly stated, but Ethan Becker stands behind his knives as well as anyone.
As far as the handles go, I wouldn't base my decision just on the fact that RAT's come with micarta scales. Micarta scales are available for Becker's, too. The Becker's are less expensive to buy, but by the time you buy micarta scales, they're not all that much less expensive than the RAT's. I have to say that, for me, the handles on the Becker knives are the most comfortable of any I've ever used, and handles are very important to me.
I personally — in the length you're talking about — would go with the Becker. If you were looking for something in the 3 to 4 inch range, it would be a no brainer: Becker doesn't offer knives in that size. If you wanted something with around a 5 inch blade then, to me, that is a no brainer, too: the Becker BK-2 is the one.