Many/most prepro's these days will have an analog pass-through for your 2-ch pre and whatever source components are hooked to it. So you don't necessarily have to physically separate your systems, except ...
The worst part of an integrated system is the front speaker placement. It can be tough to get enough physical separation from boundaries, be they the front wall, equipment racks, or a hulking RPTV monolith. I've flipped-flopped from separate to integrated and back 2 or 3 times over last few years. With the maturation of multi-channel SACD/DVD-A, I can see going back to integrated, but only when I also switch to a front projector to get the front stage set up well. What's your display situation?
The worst part of an integrated system is the front speaker placement. It can be tough to get enough physical separation from boundaries, be they the front wall, equipment racks, or a hulking RPTV monolith. I've flipped-flopped from separate to integrated and back 2 or 3 times over last few years. With the maturation of multi-channel SACD/DVD-A, I can see going back to integrated, but only when I also switch to a front projector to get the front stage set up well. What's your display situation?