Well today I finally got a chance to test drive the K30. For a start, its styling , in real metal ( so to speak, or should it be in real poly carbonate ) is actually very much better than its look in photo. And yes it is pretty substantial and while I have not yet gone through the RAW in details. My gut feeling so far is its matching the K5 or even exceed it by a bit in term of Image Quality.
So yes, KPbICA, my own conclusion is that the K30 is well placed against the K5, and unless one really need all the extra the K5 deliver. Else wise, the K30 is already good enough as a Mid Range model. Perhaps the one biggest missing is the ( optional ) detachable portrait grip but that's not usually important for most.
In reality, the K5 had been around for quite a while and likely be replaced by a new one in the upcoming Photokina, Pentax likely is ditching the consumer approach to DSLR bodies as its better to deliver Mirrorless on that sector; therefore the K30. There is now a rumor that there will be a K5 replacement in similar style and form factor ( meaning minimal change to the body and body control ) but featuring a FF sensor. If that come to be, then the K30 really made a pair.