I also have 801's with the North Creek x-o's and I regularly listen to N-802's. I still prefer the deep bass response in the 801M, but the new Nautilus "head" does reveal more depth and detail. The North Creeks elevate the "old" Matrix series to a level of resolution close to Nautilus, so spend the money on upgrading any weaker links in your system before you consider the investment. Also, be sure you're happy with the different type of bass response.
