Hey Paul. I’m going to guess you might be the same “Paul” that left a comment on my blog post regarding D90 vs. 5N. Not sure if you saw my reply there (just a few days ago)… in any event D7000 = 5N in terms of the sensor (same sensor). Handling will be totally different.
100% samples can be found around the web (or if that’s too much work, go ask at Fred Miranda). Not everyone pixel peeps, but I do. I determine if a lens is ‘good enough’ by looking at a properly focused 100% crop. If I don’t get the sense that I’m looking at an enlargement, then it’s good enough. This is very doable with the 5N.
I have the Sigma 19… but I haven’t used it much. This could be a problem. I just don’t like the build quality of the lens, although amazingly it seems to perform quite well, with the Siggy 30 being even better in that regard. I really prefer my MF Cosina Voigtlander lenses for the way they feel, the small size, and direct manual operation. I have not decided what route to take there. I wish Sony would introduce a high end 12-24 zoom!
All that said, the Oly OM-D looks to have an excellent sensor in a nice package. I didn’t care for the cramped controls though (NEX-7 feels better to me with the finder and control dials as far apart as possible) which is something that won’t come into play with the 5N unless you add a viewfinder. Still a very nice camera and definitely worth checking out.
Samsung should be releasing a couple of new mirrorless bodies this year too, and I’d want to know how those perform before making any purchases.
GL with your decision, let us know what you do!
oh, almost forgot – I recently updated the gallery of images on my 5N blog post. I have a better selection of photos there now (for the curious).
http://hikeitlikeit.com/2012/photography-and-backpacking-8/