Hi Bigjoe. Although they wont fit your MC1200s, the Sanus Euro furniture have worked well for me. They are relatively inexpensive, and very sturdy. My MC1000 amps required me to buy the optional 12" risers, but with those I was able to stack 2 MC1000's and an MC2000 vertically with no problem. The furniture with threaded posts that I have seen look good but are not stable enough for this kind of weight. They tend to sway when nudged or jarred. The Sanus stuff is of simple, sturdy design. It is purchased by the shelf, which makes additions and upgrades easy. My 2 cents.
Bill
Bill