I have always bounced around between two or more monitors - I currently have three but TBH the X series has almost made them redundant.
In fact I now use two of them for a stretched full screen view and the third is just for use when I'm working at my keyboards. The multidock, inspector, all the keyboard shortcuts and of course the jewel in the crown - SCREENSETS

have made working so much easier IMHO. I'm no longer juggling the display, just working.
I agree though that I wish the synth rack was separate from the browser. I get round that by docking the rack view in the multidock but it'd be nice to have that view and still have the browser available as a separate entity. My other wish is for the Control Bar visibility state to be included in screensets.