I'm "test driving" a D7000 right now until the stain issue with the K-5 has been remedied. I briefly had a K-5 before returning it due to the sensor stain issue. Anyhow, I've been playing with the Nikon for a while and here are some quick impressions:
Things I like:
1. Accessories that came with the camera seem better than Pentax. Real caps for the body and lens that screw on versus the push-ins that Pentax uses for kits. The battery charger seems more versatile as you can plug it directly into the wall (like an Eneloop charger) or use the included chorded plug (like the K-5 charger). Also love the hard plastic rear LCD cover versus buying the cheap film protectors for my Pentaxes.
2. Live view and the dedicated movie recording button seems better implemented with the Nikon. I've always disliked turning the mode dial button to get to movie recording on the K-7/K-5. On the Nikon, you just flick the Live view switch and then press the button to begin recording.
3. Size and build quality of the Nikon is also quite good. I was expecting a big camera, but it really is not much larger than a K-5.
4. Dual SD cards. Wonderful idea, especially considering the file sizes cameras produce these days. I'm using a 16GB class 10 card which the camera guesses amounts to 420+ or so photos. When you toss in video, space goes quick and having a second card at the ready without swapping is nice.
5. 1/250s flash synch. Not much to say about this other than wishing I could do this on a Pentax. Honestly though, I do mostly manual flash shots, so it's not that big of a deal.
Things I didn't like:
1. WB and ISO button placement sucks. Maybe I just got used to the ISO button on my Pentax, but I agree with DPR's opinion on this. When I shoot my left hand is typically cupping the base of the camera with my thumb, index, and middle fingers to adjust focal length on the lens. Having to bring my thumb away from that position to search for the ISO button slowed me down and seemed counter intuitive. Of course, you can set Auto-ISO and not have to contend as often, but it's still not as intuitive compared to the K-5.
2. Shutter sound. It's not loud, but it's definitely not as quiet as the K-5. Even when you put the D7000 in "Q" (for quiet shutter release) mode, it still is louder than the K-5. I think someone described the K-5's shutter release sounding like a stick of butter hit through a tennis racket.
3. Grip. For what it's worth, I figure I have medium to large sized hands (I wear med in most motorcycle gloves). For me, the D7000's grip felt fatter than the K-5. I guess that's the best I can describe it. I felt like I could grip the K-5 more securely because my fingers covered more of the grip on the K-5 versus the Nikon. The dual SD card slot on the grip probably contributed to this (hence why I'm calling it fat).
4. Build. Ok, I know I mentioned it as an aspect that I liked above, but when comparing it to the K-5, I felt the K-5's build was better. Although well built, the D7000 just seemed more "plasticky" when compared to the K-5. I'm chalking that up to the extra seals that the K-5 has in addition to more magnesium alloy. The K-5 being a smaller camera, still felt more hefty if not substantial.
5. AF in movie mode. I was excited about this feature, but realize it's just a gimmick. For one, it's super slow and for two, it's really loud. The stereo mic is located close to the lens, so if you're recording a movie and have it on AF, you can expect to capture all the noise involve with the camera trying to focus. MF is much quicker and quieter.
Anyhow, that's my subjective initial impressions, as I'm still getting to know the camera and put it through the paces. If anything, it's making me miss having the K-5 around
Thanks for reading.