It's a no brainer IMO. The Fact 8 crushes the 805D. I don't even think the 805D wins if you just compare 60hz up. In other words, if you somehow limited the Fact 8s low frequency output to 60hz so it matched more closely the performance of the 805D, I'd still prefer th Fact 8 to the 805D. BUT, when you add in the "fact" that the Fact 8 provides WAY more bass, it's no contest, the Fact 8 is a much better choice. Not saying the 805Ds are not good, they are, but the Fact 8s are a league better in every way. And I'm holding back how I really feel... : )