If you're lucky, you might even become a beta tester. Send enthusiastic letters with feedback.I like the concept of wiim amp but I’m not sure if its power output will be sufficient to power Polk legend. I’m currently using Yamaha AVR in pure direct and pre out on external amp 450/ch. Even at this power out they just produce decent volume.
You have great speakers. Is the sensitivity about 87dB? My Focal is 91.5dB, so it's probably fine.