Sounds like for you, the Sony is a dud. OK, I’ll accept that especially since you were happy with the previous Olympus. If the only problem with the Olympus is the USB interface, does it use a memory card? If so, you could remove the card and out it in a reader attached to your computer to get the photos out. This could save you $500 and the learning curve of a new camera.
If you would still rather buy new one thing I might suggest regardless of brand; look for an electronic viewfinder option that reads the CCD. In bright light situations it’s almost impossible to compose from a LCD screen. Optical viewfinders are better than none, but nothing beats being able to see exactly what the camera sees.