Norway
Im allso using the Antec Black 430 and a Harmony (885).
Under add component: Computer ->media center pc -> Antec -> Fusion Black 430
So its in harmonys database, and working just fine. I havent tried setup my harmony as MCE, so I dont know if its any better or worse.
After I lowered the remote button timings (repeat delay and button held delay) in IR server suite (iMon configuration) to IIRC 150/100 I think the responsiveness is fairly good.
have you managed to set up the commands to work on your remote. Can you get it to turn on all your devices in one go?