I received mine recently and have had some time to listen to it with a variety of genres. To my ear there is a noticeable improvement over the Rx Mk2. It is pretty unforgiving of bad recordings because it is so detailed. You know you have something good when you start smiling as you listen to a favourite track, hearing something new for the first time.
Design-wise, I'm not happy about the volume knob. It is completely smooth, making it difficult to grasp and turn without holding my rig in two hands (ipod/continental in left hand, turning knob with right hand). I'm wondering what I could add around the edge to make it easier to grip - perhaps trimmed-down duct tape?
In addition to the knob, the power plug prong doesn't fully insert into the Continental. At first, I thought it was stuck and pushed harder - this could lead to damage.
Heat-wise, It does get quite warm to the touch. Nothing that would burn, but I'd worry about overheating if left somewhere with poor ventilation, like a bag.
Power-wise, it obviously oozes gobs of power. I don't need to push it past 7.30 on the dial (starting at 6). I can't wait to test it out with some of the heavy hitter headphones.
Overall I'm very happy with the Continental, and will likely keep it for work listening, and the Mk2 for portable/pocketable listening.
Is it worth getting if you have the Rx Mk2? I'd have to say no unless a) you have the money, b) you have the need, and c) you don't rely on portability. Both are excellent.
