Generally too heavy than they need to be, unless you're fishing some real deep beds or you wanna whack the fish real good. Like the other fellas said, the heavier the jig, the better chance the fish has of throwing it out of it's face. However, I will tell you that I've had excellent success with the Lure Logic jigs as far not losing fish goes. They've got a real light wire gammie hook that penetrates really well. I really like sight fishing with the heaviest, fastest falling jig possible, but as you've discovered you lose a lot of fish with heavy jigs like that. I don't think I've lost a single sight fish on the 3/4oz lure logic. But I don't think you can do any better than texas rig for landing fish. You're obviously getting them to bite with the jig you're using, so I'd say stay with that until the fish is all riled up and about to bite, then switch to a texas rig.
-Brian