Does anyone have a link to the user/programming manuals for MC1, TX1, SBC and GX?
Those types of replacements (Sage to Tridium) go well when you know Auto-Matrix hardware. If you don't know all the attributes that lie underneath the Current Value, or how the controller schedules work, or how the control loops are addressed to correspond with the outputs, you'll end up fighting the controller - so do your homework!!
And if the Sage is running any programs, make sure you can emulate those functions. Some programs can be emulated simply by linking two objects together (which requires a custom program in the Sage if the points lie on two different PUP networks) - others can be emulated through regular Tridium objects...as sophisticated as SPL is, I've been able to get every SPL program I've run across ported over to Tridium with a minimum of fuss...
Or keep the Sages - provided you don't lose a hard-drive, those things run incredible amounts of controllers and points with nary a hiccup. But dapper is right on the money - AAM's existing software sucks for trending and alarming, although the graphics can do just about anything you need, as long as that's all you need (although setting schedules is a little kludgy too...).
It looks like AAM has re-invented the wheel again (their corporate history is all about re-starts, from a software perspective - in less than 20 years, they've used four different GUI's (Mouseview, Spectra, Auto-Pilot, then they finally "discovered" Tridium)) with Aspect being the latest and greatest front-end. If you're not a dealer, then it may not be available to you, so perhaps the Tridium route might be to your liking - but find out if Matrix is going to be supported by AAM for any length of time (or simply buy the PUP driver with a WEBS controller or a JACE (if you have access to the Vykon channel)) - there's no need to rely on AAM to support your front-end of choice, given that their track record shows that they'll forget all about it in 4 or 5 years anyway. To be fair, some of the changes in software platform were as a result of PC technology advances (Mouseview was DOS-based, after all), but they never really developed any of the Windows packages to a fully-functional software suite. Once they finally got to Tridium, several years after forward-thinking people finished the PUP drivers (for the r2 stuff too!), they've moved on again...
But you'll like the hardware, once you get to know it - like Reaper said, hearty and reliable.