Top 3?
As others have said, it all depends on what I am shooting.
#1 - Minolta 85 f/1.4 G(RS). This is the easy one, it's a superb lens, and when I get the shot right, the images are special.
For 2 & 3 it's a case of what do I use most, so
#2 - Sigma 24-70 f/2.8 IF HSM. My standard walkabout and general landscape lens, I woudl prefer to have the Zeiss 24-48 f/2.8, but the Sigma is still pretty good, and was within my budget!
#3 - Tamron 70-200 f/2.8 Di USD - for when I want something a little longer than the Sigma. Again, if I had the cash I'd get the Sony 70-200 f/2.8, but like the Sigma, the Tamron is not far off the Sony, but half the price.
Other contenders woudl be my Zeiss 16-35 f/2.8, Sony 70-300G and Tamron 150-600 which I am all very happy with, and if I needed to replace any would get the same lens again, but the versatility of having 24-200 f/2.8 in the Sigma and Tamron means they are 2 lenses I would always want in my bag.