Not sure if your case is as well-suited to an ICBM as some. How are you thinking of hooking it up? Is the DV-37 connected to the Sony 555ES with a digital audio cable, or is the DV-37 decoding the audio and outputting to the 555ES with 6 analog interconnects? If it is the latter, the ICBM could be added between the DV-37 and the 555ES. Otherwise, it may be tricky to fit the ICBM in to your setup. Also, I'm curious about how your speakers are hooked up -- particularly the built-in subs (is there a separate connection between the LFE output on the 555ES and the subs, or do the subs get their signals from the speaker cables?).