Though the AV7000 looks identical to the BeoMaster 7000, it's actually a separate video master that must be linked with either MCL (Datalink and Powerlink) or ML (via a BeoLink adapter.) The biggest problem will be figuring out if your equipment can be controlled by the very limited STB controller which the AV7000 uses. There is an image somewhere on the old site that lists the latest software revision (2.0.6). I highly doubt any flat-panel displays are listed, but it's possible that Samsung kept their control codes consistent from the CRT range. The other problem is that the AV7000 wants to use composite video for source switching, though you can work around that if you try hard.
I would only consider the AV7000 if you live in North America, and then probably only in conjunction with a Lintronic to really provide the modern device control you need.