I think I've actually narrowed down my choices to three. The Sigma 17-70 2.8 to 4 and the Tamron 28-75 2.8. I like that both lenses cover the typical portrait range which is what I'm most interested in. And finally the Sigma 24-70 EX Macro. I like that the one Sigma has a wider range and seems like it would be a better everyday lens. I'm waiting to see some more reviews of it but the reviews of it's predecessor seem pretty positive. Reviews of the 24-70 EX seems excellent as well and that is a Sigma EX lens which is supposed to be a more solid build.
It all boiled down to figuring out what kind of photographer I am. I am never going to try to make money off this hobby. I might do an occasional portrait shoot for someone but I'm not going to pursue this as a money maker. In that case, it just didn't make sense for me to put money into Canon L lenses. They are great lenses but double or triple the price of a Sigma or Tamron lenses. And the Tamron and Sigma lenses get generally very good reviews.
So I think I'll let those thoughts simmer a little while longer but that seems to be what's sticking in my mind and more importantly what "feels" right.