Originally posted by kiwi_jono I would not say (personally) that the top LCD screens are NOT a must. I find they can be convenient to have while working on tripod but personally I could live without one.
As far as long life goes, the K-5 has the better build versus the K-30 and generally considered to be more rugged. Also the K-5 has better extension possibilities (optional grip, external microphone socket, tethering etc). On the other hand the K-30 has some new features that the K-5 does not have (like focus peaking in Live View and improved autofocus is low light).
That's personal indeed of course. For me it's needed when I'm on location without tripod or mono pod, so it's easier&quicker to watch for battery life&memory. But if it's really necessary, the K30 doesn't have one, so you end up with the K5.
As I haven't used the K5 that often as I would've liked, I loved it when I started with the camera, and still do, well, if I look what I had before, the K200 of Pentax. Less flash needed. Have no experience with the K30, but the K5 had even more then what I was searching for in the first place. But it had as said more then I needed but it had the main things I did need, for example a stronger batterygrip, and the store said I could've waited for the K30, but there were no possibilities for a batterygrip and the screen on top was missing. Didn't know anything about the K30 and only know things from this board, reviews and the stores. I haven't regret buying the K5. But the main problem was that the K30 wasn't really released yet here in the Netherlands when I bought the K5 at the beginning of July. So I couldn't test it.