Well, I jsut received my E5bi's yesterday and initially out of the box the build quality is quite nice. I will be setting them up this weekend and will report back about how they sound. What leaned me toward them was they where comparible, at least on paper, to speakers that cost $100-200 more, they have a 30 day money back warranty with free return shipping, and the form factor fit what i needed. Loking at the specs of the Yamaha they are a 6 ohm vs. the EMP which is an 8 ohm if that makes any difference to you.