I like both the courts you suggested and Rogerfed1's Cincy twilight and night courts are my favorites for those times of day.
I'd like this Rotterdam in particular because of the full crowd in addition to it doing everything else right; I haven't seen a single other full crowd HD Rotterdam. And I simply love the color in the Cincy '12 final court. The cameras or paint job seemed changed last year and even though the resolution of the Cincy '13 courts is improved, I'm still partial to this Rounders court.
The Cincy court is preferred if you can only do one. I only use one Rotterdam court (indoor tournament with no weather/time changes), but I frequently switch up my Cincy court; that becomes quite tedious when I have to go into the net file every time to delete or re-insert the net info since this court has the net already included.
Edit: Regarding editing someone else's court, I don't see why it should be a problem so long as you give credit for the original work to the original creator. There have been several posted 'changed camera angle' courts that have simply been edits of pre-existing courts with no complaints. Of course I'd understand if Rounders himself said he didn't want edits being posted on here though.