I'm not sure if you've ridden a bike like this before, but there are some things you should know (I've had these types of bikes for a long time, and currently have a turner 6-pack (just like the rfx)):
A fork with lockout will not help you climb such a bike. You NEED a travel adjustment (like with the talas) to lower the front end so it doesn't ground-loop on you as you try to climb. This is the real issue.
It's not going to matter if a bike that heavy is bobbing. It's not a light bike, and a little bobbing doesn't really do much, and also realize that if you eliminate the bobbing you decrease the traction significantly, so it could make those climbs even harder. Don't try to adjust the rear and front suspension to "not bob" unless you're riding up on hard roads, otherwise it's not going to help, and the real reason it's tough is because it's heavy, and that's it.
Front-end bobbing is usually NOT an issue with full-suspension bikes, the rear end deals with a lot of that energy, but with a hardtail the only thing that can compress is the fork, and it does so readily due to the weight transfer and forces. Once again, lockout on the front end does not help you climb a bike like this. They don't really "bob" on the front end.
Now, the RC2 may be a good fork from the tunability standpoint, in fact it doesn't have the ability to easily change the progressiveness as you can with other forks, so some riders feel that the talas fork tends to "blow through the travel" more than others, adding some compresion damping can help with that effect, as well as help out with brake dive, although in both of these situations it will ride a little harsher, that's simply the reality of the adjustment.
In any case, the RC2 can help you get a good compramise as far as these factors are concerned, but you really shouldn't be buying it to engage the lockout on climbs, that's simply not the issue with long-travel bikes. You're not going to get front-end bob to any noticable extent, and the real problem is the axle-to-crown height, and on real steep climbs you gotta lower it down so you can keep the front wheel on the ground during those steep climbs.