Agreed, but I would like to add that the other great landscape lens with fairly good resolution, which will be available soon, hopefully, is the 600mm MK2, creating a geat foursome covering all angles.
Seriously though, I am sure that I have mentioned this before, but a pro landscape photographer was interviewed by one of the leading photography magazines and he stated that the lens that he could not do without and that set his work apart from a lot of other pros was his 600mm. That allowed to get shots that no other lens he owned could deliver, including aerial shots and he couldn't do without it.
Rocco, any or all of those lenses will be superb.

I'll include the link to the FM Alt(alternate) Lens thread that I follow, there are quite a few pics recently from the Zeiss 21mm on this page and the pages either side. If you check out the posts from Greggf, he used to post a lot on this forum until he fell in love with Zeiss and now has a bag full of them, he has just picked up the 35mm and there's some shots from him. I have bookmarked and have been following this thread daily from about page 200 and this is why I have a couple of Zeiss lenses in my bag.
http://www.fredmiranda.com/forum/topic/860134/477