I'll toss my thoughts in on the OBF. I am ambivalent about it. First off, I use RF triggers with my strobes, so no worries about control via the flash. Second, I usually have a small dumb flash for emergency triggerm of the strobes. Third, I will use the OBF for fill flash in really bright contrasty light with it turned down and gelled to match the WB (assuming I have the time to do so), but I absolutely hate the results from the OBF so I rarely use it.
I would happily trade OBF for WIFI/GPS (altough I can live without WIFI, I do like the GPS for various reasons).
I guess one big argument for pro cameras lacking OBF is that they are more durable without another part to loosen or break off.
For me the K-3II would be the better option (based on a few factors, the least of which is the lack of a flash).
I agree with the folks above, unless you fall into the durability camp or are trying to save what is probably 1oz total from the OBF, just don't use the OBF and it's inclusion is irrelevant.
---------- Post added 05-10-2016 at 11:50 PM ----------
Originally posted by RobA_Oz So, I agree with markl62, that the K-3ii successor should adopt the K-1 tilt screen (good economies of scale for both models, there), cable tethering and improved WiFi features (including range and transfer rates) and, if possible, reintroduce onboard flash (possibly using LED technology, as I said before). It goes without saying that the improved AF system from the K-1 should also be adopted and maybe even pushed further in the areas where Nikon is the current leader. All, of course, while maintaining the existing elements, like twin SD-card slots etc.
Agreed. I just picked up a K-5IIs to replace my K-7 (truly an upgrade, I couldn't stand the IQ or issues with the K-7 and think the IQ on the K-5IIs is similar enough to the K-3). However, the the K-5IIs is just a bridge body for me to see what Pentax does with the K-3 successor, I'm hoping a lot of the K-1 features trickle down to make it the ultimate APS-C DSLR body. If that is the case, I'll definitely have to take a hard look at the successor vs the K-1. I'm not one of those folks that needs 24x36mm sensor, so if a K-3M3 comes out with a lot of the K-1 tech for $1000, I'd definitely consider it strongly. However, I expect the K-1 to drop down to maybe $1300-1500 after a year or so, which would probably edge me towards the K-1, keeping the K-5IIs as my compact body.