[brewing]

SGC is easily the choice for me, with BVG way in the rear.

SGC wins on consistency of their grading and quick turn around. How often do you see a SGC over or under graded? Way less than the others.

PSA sells, especially to those that buy plastic. Their basic service takes forever. Cards are consistently over or under graded. Volume should be no excuse for quality of grades or turn around time.
Don't even get me started on qualifiers, bar none the stupidest thing in TPG. Still looking for the "corners" qualifier, since they have one for most of the other common flaws. I do like that their cases take less room to store.

BVG, bleh. Consistently over graded. When I buy, I automatically consider the grade is really 1 grade over. Grading service prices are way too high, too. Their cases are tough though.