It will be interesting to see the specs of the inevitable Sony SLT A99.
I have 2 A700s and one A55. I bought the A55 because of the faster frame rate as I shoot surfing. I certainly hope the A77 has fixed the slow responsiveness of the EVF in the A55. I couldn't use my A55 because I kept losing the subject in the frame. I ended up going back to my A700's.
1singur: EVF is a big minus, but let's just say that for now this is what sony puts into APS-C cameras. However, i have a feeling that an anticipated A99 won't get back to OVF, which it would be a shame, not to say fail.
I found the EVF on my A55 useless for action photography. I kept losing the subject (a surfer). I stopped using my A55 and went back to my A700 because of this. It was a function of the slow load time of the digital image in the viewfinder. I will check out the A77 when one appears in the shop to see if this has been fixed.