Interesting experience there. That's another factor that has me wary of going full-blown Nikon with my setup: I get the impression their lower-end crop bodies are a lot more gimped than Canon's. I shot with the Rebel series for quite a few years and was completely happy, knowing their IQ was identical to a 60D or even 7D. With the D5x00 or D3x00, it seems there are reports of soft images, not to mention the ridiculous inability to AF with many older lenses. No doubt about it, Canon is a system that offers more value for your money overall. Sadly, for landscapers on FF, the combination of embarrassing DR and the complete lack of decent UWA zooms kills the deal.
Keep in mind Canon doesn't have any "old" lenses (pre EF/EF-S) that AF on any modern Canon body, entry-level or not. As for soft images I've been using several D5000 and now D5100 bodies since their inception and never had a problem. Here are a few samples:
D5000 + 35G f/1.8:
D5000 + 18-105:
D5000 + 18-105:
D5100 + Tamron 17-50 non-VC:
D5100 + 18-105:













