One thing about Olympus...

You get WAY more lens for your money than with the Big Two. The Olympus Zuiko lenses are really fantastic. The sensors are holding them back a bit but sensor technology improves every year while lenses are usually not upgraded for decades. The 12-60 SWD is one of the best standard zooms ever, on any system. the 14-54 is probably the best zoom under $350 for any system, period. The 14-42 KIT LENS is probably the best kit lens on the market, for any system. And it's less than $100 on ebay.

Besides, you really don't want to be replacing your expensive stabilized VR lenses with VR v.2 lenses, do you? Body stabilized systems, like Olympus, Pentax and Sony upgrade the image stabilization every time they release a new body. Can the Big Two claim the same thing?

On the other hand, they really stick it to you on camera body price Olympus seems to under-price their low-tier and overprice their high-tier. I don't really get the Oly pricing structure, but the lenses are really nice and the bodies keep getting better every year.