I've recently acquired a McCulloch Mac Cat top handle saw which runs good but I'm afraid it's a bit heavy as top handle saws go but it might be good to build up the old bicep if I try it one handed..
For general homeowner work, three Poulan models: S25DA (early 38cc top-handle), 2300CVA (later 38cc top-handle), and the rear-handle version of the 2300CVA.