Don't buy into the hype.
I bought a A55 when they first came out with a 24-70 and 70-400. I'm so much happier with the Canon lens selection, the old-school mirror, etc. The Sonys overheat, take terrible high ISO images, don't take in as much light, have a mediocre lens selection (mostly rebadged Minolta lenses), have mediocre accessories, etc. I wrote a long post on DPreview about my experiences that the Sony fanboys hated and helped to delete.
If you're going to buy Sony, buy a NEX.