I got an old SGI AT101 with dampened ALPS a while ago, and I fell in love with it. I have two Model Ms, a CM QFR Blues, and various others. But so far, the ALPS has hands-down become my favorite.
I treated myself to the CM Storm after passing a cert test, so I considered doing the same with the new Matias. One question I have though is regarding the keycaps. How are they? On the SGI for instance, they are quite thick PBT and even compared to Dell AT101s, they sound much better. They have a "warmer" sound characteristic than the Dells. From the audio tests I've listened to for the Matias, they seem to have a nice sound with none of the "cheap keycaps" hollowness. That's one of the things about the SGI and the Model Ms I love compared to most Cherry boards I've encountered (usually ABS I'm sure). Lesser ABS Cherry caps impart an annoying (to me) shallowness to the overall experience because of the sound.
But then again, in the grand scheme of things it's a keyboard, and a rather small bit of life, eh? :-D