I think this was a foregone conclusion before the thread appeared anyhow.
Like Adam said, as a hobbyist, this is more of an emotional aspiration, rather than a scientific/calculated/business decision.
Nothing wrong with the emotional/hobbyist aspect of a decision like this .. LOL mine was! ... but it also has to be said, my decision had nothing to do with any advantage for landscapes .. more so for shallower DOF with full frame capable lenses(oh! and the ability to shoot some quality video too).
As long as you can understand why you're doing something, and how it offers advantages over your current setup, it's almost certain to be money well spent.