Oh I can't imagine shooting landscapes with anything but a ball head. And the RRS head is the cream of the crop (priced accordingly, to be sure). You can quickly compose the image in all three axes (pan, tilt, swivel), then lock it down firmly with a twist of a single knob. You can also dial in some resistance with a separate knob, so when you unlock the main knob you still have a bit of friction if you so desire (nice for heavy lenses). The ball head is especially brilliant when it's cold and dark outside, and you're working with a flashlight and big mitts.

I also have the TVC-34L (love it), and got a leveling base with the long knob that includes a hook. When I shoot with the 500 f/4, I use their side-mount gimbal setup instead of the ball head. I have the quick-release base for the ball head, so I can pop it off and attach the gimbal system in a snap. So basically I bought the fanciest system that they offer, but it works so well I am now spoiled for life.

Anyhow, everyone's needs are different, so you can definitely try out the setup you're describing and see how it goes. But for me, there's no going back.