Lived in Hattiesburg a few years back, so I became a big fan of SoPro. They have pissed me off twice now by ceasing production first of Jack the Sipper, which was and Extra Special Bitter and one of my all-time favorite beers, and then Mississippi Fire Ant, a high-octane red ale.
If you like high gravity beers, you should try Bell's Hopslam, if you can find it. I think it is a limited release, seasonal. It is a double IPA that tips the scales at 10% abv, but you would never know it from the taste. (I know, Bell's is a Michigan brewery, but good beer is good beer and 10% is 10%). Of the Memphis IPAs I have had, I like Crosstown's Traffic more than Ghost River's Zippin Pippin. Memphis Made Brewing did a New England style IPA called Minute Man that I really liked, but it was a limited release and is no more.