Okay, well to answer your question, yes it is powerful enough to run it, but no I do not think it is a good idea. When under load, the modxstream has voltage ripple barely within ATX spec, and it could significantly decrease the life of your parts.
I love the look of that 470 with the block on it I'd like my rig with a LCS but i cant really afford to splash out atm, maybe next october when i get my new uni finance in