I think the only things I would consider "intrusive" in my small apartment space are the subwoofer and the AV Rack. The B&W 600 series speakers look quite nice in the living area, and don't really stand out as A/V equipment off hand. The subwoofer, however...man, I wish I could hide that thing. It's a big cube on the floor jutting out around a corner. The rack is in a closet currently, but once I get shelving for it, it too will be out in the open and kinda fugly. Perhaps I can turn it into a standing desk? I dunno.
All in all, though, modern A/V gear looks downright sensible and stylish in almost any room. Personal opinions may vary, though.