Hi sodoi18
I'll give you some positive feedback on the wireless system because I use it very often and it works very well indeed. I have three units, one transmitting and two receiving. One receiver is used for the audio channels for the link TV and there have never been any delays or dropouts. The second receiver gets the NMusic and NRadio from beoport to my older beomasters and that works very well indeed.
I have not had the opportunity to use a large, wired masterlink system so I can't tell you whether it is going to be better or worse or by how much. My home simply doesn't lend itself to installing a wired system, it's very open plan and has thick pre-cast concrete walls. If I didn't have the beolink wireless, I wouldn't have a system at all.
Our house uses a fair amount of wireless equipment, the computer network and the Beocom6000 network. There is also a microwave but it doesn't get a lot of lengthy use, just short term zaps!! So far, the effects of interference seem to have been minimal but that is just my experience.
I agree with the comment about borrowing a unit for testing, that is the only real way to get to the bottom of this issue. For me, I am looking for another two wireless units so that I can expand my setup and I'm certain that the results are going to be good.
Regards
Geoff