I've had the IIIA's for a few years now. They are a steal if you can find them used ($700-$900). I agree that these speakers require serious power. I use a Bryston 4bst (400 watts into their ohms) and still think I could use a bit more. I haven't found the need for a sub, although "need" here no doubt reflects listening prefences. With enough power -- PS Audio p-cords and plug help here-- the bass is articulate and rich. Due to the nature of the upgrade bug, I've considered other speakers, e.g. B&W and Audio Physic, but nothing from either line has had the texture and presence of the Maggies. In fact, I have yet to be tempted by any other speaker I've heard.