One question I'd have is where are you going to play. There are venues which are very small, and for those venues the space savings of an all in one unit may be something to consider.
One place I'm aiming at is musical theater pits, which are pretty tight. (For some reason, audiences are interested in what's happening on stage, not with the musicians. Go figure.) I also remember playing a restaurant in Massachusetts which had a small triangular stage. We had to coordinate getting on and off the stage to make sure we didn't knock anything over.
For me, I'm trying for a setup that lives on a single
K&M Spider Pro stand, thus reducing the amount of floor space I take up.
If you're playing large venues, this isn't as important. Rick Wakeman's keyboard setup would fill a normal sized living room. And if you've got roadies, you could also stash sound generators off stage.