I'm familiar with these brands...sorry I know Sony and Olympus also offer cropped sensor DSLR's in the same bracket...just don't know their models as well. But include them in.
I have noticed that of late...Canon has dropped the price on their FF 5D, Mk. 11, Nikon I think has done the same with the D700 and Sony has brought out the A850 (? right model name) FF at a low, appealing price.
Sony, IMO started this lower priced FF DSLR ball rolling when they brought out the A850. Kudos to Sony....I just wished they had done this 3 years ago, before I started my cropped sensor DSLR system.

FF was out of reach of many an advanced amateur...but now with these significantly reduced FF prices.....well is the game set to change ?
I wonder if the big two (N.+ C.) ...and Sony..continue this price reduction for FF DSLR cameras will FF eventually replace premium quality, cropped sensor DSLR's like the D300S, 7D, K7, etc.... ?
If this happens the others....Pentax, Olympus will have to get on the FF wagon in order to stay competitive with the biggies...Nikon and Canon.
I recently handled the small Samsung NX10...with interchangeable lens. I could see this Samsung style camera format, taking over from entry to medium price, level cropped sensor, DSLR's.
It's small, feels like a quality unit and having different lenses, etc...and a relatively low price will appeal to the market niche that wants a good camera, with interchangeable lenses...but who don't want to go to the premium level cropped sensor DSLR.
If the cost keeps going down on FF's to the point where there is not much point in getting cropped sensor DSLR's...where will that leave the cropped sensor premium DSLR's ?
This market will presumably dry up.
Then camera companies will focus on FF DSLR's , which will be for advanced amateurs/ pros.
Where that will leave me and others with our many cropped format lenses...I dunno.
But I think this is what will happen within the next 5-10 years.
If I had to start over again...no cameras, no lenses....I think I would buy a Canon 5D, Mk. 11 FF with the 17-40 L Canon W/A, the Canon F 5.6 L 400 mm, the Canon F 1.8 mm normal lens.
This would be actually a bit less then my Pentax premium quality DSLR body, entry level DSLR body and 6 Pentax lenses.
At one time the 5D body was way out out of my budget for a body. Not so much anymore.
The only thing I can see is manufacturers hesitant on making their expensive cropped sensor DSLR's and lenses that really work just for the cropped sensor format...obsolete.
A lot of customers won't be happy when they see their cropped sensor 'investment' worth very little.
Also, although some have felt their FF DSLR's are the new Medium Format...I never saw it that way.
Having a medium format system...one body (Mamiya) and three lenses and having used the Pentax 6 X 7 system...I know what these film medium format can do, compared to 35 mm slr's and FF...35 mm sized sensor digital systems.
The new Pentax 645 medium format's sensor has 40 MP's on a sensor that if I recall correctly is around. 1.7 times the size of a FF DSLR.
Ditto in sensor MP's and sensor size with those other medium format digitals....Hasselblad, Mamiya, Leaf, etc.
But that's an aside...the real question will the cropped sensor DSLR be on the endangered list within 5-10 years or maybe sooner ?