I love medium heavy 3 power Loomis rods. My IMX and GLX are 7ft rods that are used for 3/8 and 5/16 oz jigs. The tip action is perfect for pitching these jigs as well as soft plastics. I can use a 1/8 oz bullet weight and tube with these rods and then switch over to one of the jigs I like and never miss a beat with casting and pitching.
When I do toss 1/2 oz jigs I usually go to a heavy action 7ft or longer rod like a 4 power loomis. Everyone is different in what they like so maybe you can try a friends jig rod or go to a store that will put a reel on a few rods for you so you can get the feel before you buy?
You cannot go wrong with any of the high end rods.