Upgrade to a77 from a100

Thanks to everybody for your replies. I see a bit of risk in landscape photos with plenty of light hence ISO 100. Well, I don't expect the a77 to be better than the a100, I would be happy if it wouldn't be worse.

I would expect some more dynamic range though. I shoot quite often agains sunshine.

Can somebody advise oin the specs of the SD Card? What is a minimum or good speed?
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Miltos