7D or K-5 or D7000 or A-77?

I am thinking or getting a new DSLR, and looking at these choices:

Pentax K-5
Canon 7D
Nikon D7000
Sony A-77

I have reviewed the specs. All of them are overkill for the product photography I do. My other use is landscape photos, HDR, family shots, etc. Because of desert and ocean areas I frequent, I do care about sealing and know the Pentax is superior, but Image Quality ranks as #1 for me.

Does any one of these stand out as superior to the others for stills?