Upload & Sell: Off
It looks like a nice lens, esp. for the bokeh and color, but the corner softness and CA tell me that you're better off with something like a Contax 28/2.8 or Oly 28/3.5 for landscapes or architecture. It looks like Voigtländer took too many corners again to achieve good all-round performance, like with their 20/3.5.
...especially if you're shooting stopped-down, there's little point at spending so much on a compromised lens like that. The CV 20 really does little well beyond controlling flare, and the 28 from Lloyd Chamber's analysis seems along those lines but not as challenged. Probably fine for a crop sensor camera but surely not worth the cost.
I shoot normally at F8.... Love the lightweight feel of these lenses and don't miss the weight of the Nikkors at all. The build of these lenses kick Nikon's "plastic wonders" butts.
Then the venerable Nikkor 28/2.8 AIS (used) is half the price and easily its match.