I think it depends on how often you will be going out without your hubby. When my hubby is with I almost never have to use the double stroller, unless it is a particularly long excursion, like the zoo.
I am alone with my 3 kids 95% of the time, so I love having my 2 yr old and my 4 month old in the double stroller (we have both a tandem and a side-by-side double jogger). I also have an Ergo and love it, but some days it is simply too hot to put my baby in it. Since you are in GA I imagine that it gets much hotter there during the summer than it does here in Chicago.
I have a Graco Duoglider, which was about $160. For a while I had convinced myself that I hated it--guess I had stroller envy for all the cuter, more expensive models out there. I had even considered giving it away, and now I think I was NUTS to even think of it! I love it. It has a very roomy basket, is easy to open & close, fits in the back of my van and my hubby's trunk, can snap the infant carrier to it, and can get my 2 yr old out easily from the front.