If you need handheld, check out an older folder, like a Voigtlander Perkeo II (6x6) I think you can still find them for less than the cost of that C330 and definitely less than a Pentax 6x7.
But, since you are doing landscapes, why not go 4x5? You can get a speed graphic and a 6x7 rollfilm back for about the same price as a C330 (if you really need 6x7). Maybe a little less even. If you are planning on using the C330 handheld, I could see why, but for landscapes you need the tripod anyway.
I have a Fuji GS645 folder which I use for handheld medium format stuff, but for a landscape I'll use the 4x5 whenever possible.
Just a suggestion,