Zman.. the trade-up ship sailed two weeks ago, but if you're interested in a truly virtuous system, I will be putting together an M451 + Piano offer that should be appealing to you The M451 is the best platform to "tweak" if you want to upgrade the things we've done on the M901, similarly or differently. Danny Richie is doing a sonicap version of the ONE.2 which should be sweet and I'm sure he can sell you some wire, cables, and posts to get the most out of your M451.
Gcos... there's a guy in England building carbon fibre tops for his Sensation. Another guy putting his own veneer on them to match his speakers. Folks are putting magnets on the chasis and/or setting them on wood blocks to reduce resonance... I'm sure that this is just the beginning of the customization madness... I love it!