Quote: I've heard all those and then some. I consider my Leckerton UHA6S better than all of them (except the L3 and RX3) and have used it exclusively from more than a year and a half. The RX3 and the L3 are the only 'portable' amps I would consider upgrading from that I've heard. I like the RX3 better than the L3 and it's actually portable. For me better is being able to render the information on a recording, not different flavors of sound. Unless I get to hear a Portaphile to convince me otherwise, the RX3 is the only portable amp on my radar.