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I am primarily landscape also, I use both DXO, C1, NX2, IDC and PSCS6 and I have a trial of LR5 and Silkypix.
DXO is my main goto with PS for the "Content Aware Brush" which DXO lacks.
If DXO had the CAB I could tell Adobe where to put their products.
LR5 is a work in progress and has some nice features, but the "Dust Brush" is a disaster and IMO completely useless.
C1 is a nice editor but no CAB at all and their dust brush is very simplistic, so I don't use it much in my work flow and the interface learning curve is much higher than LR5.
Canon DPP is probably the closest to what you actually see, but limited. I would like to see what Canon COULD produce software wise if they really tried.
Sony's IDC is not bad but could use more development & refinement. Nikon's latest version of NX2 is very good, but there again, no CAB.
The latest Silkypix has improved tremendously but still has a ways to go.
Elements 11 has tremendous possibilities if they would make it a full 16 bit Editor instead of crippling several functions by making them 8 bit.
Hope this gives you some ideas.