Help me with the MIDI!

So I've never been happier with the state of my studio, between buying Digital Performer, getting some of my gear that was leant out back, borrowing some killer stuff from a friend and getting my hands on a kenton midi to CV I've got a kick-ass set-up. My problem though is I keep switching around how I'm working and racking my brains about how to avoid constantly having to unplug and plug-in MIDI cables. I know there are various cheap solutions, several cheap ebayable MIDI switchers and MIDI thru and merge boxes. The problem is that sometimes I want Performer to control everything, and other times I want my MPC to. The MPC doesn't have enough outputs, but a MIDI thru box would take care of that. I have a MOTU 5 in 5 out MIDI interface and wonder if I can't somehow use that as a thru box? There are also times when I want the MPC to be the master, to have it sending MIDI sync to Performer, to a drum machine (or 3), while driving some of my synths. I think you can do some routing in apple's Audio Midi Set-Up but I don't know if that totally would work the way I want. I also know I could do crazy routing in Performer, but I don't want to have to boot Performer every time I want to quickly start sequencing with my MPC. I imagine I can get a few thru and merge boxes and have it set-up so that basically every thing is both getting and sending MIDI to everything else...or should I go with some kind of switcher?

How do other people deal with this, or do they not? Do people tend to just stick with their one master? Do people go crazy with thru and merge boxes? What do you do?

Or do you use the Cinco Midi Organizer?
http://www.youtube.com/watch?v=rKzmMej8A3c