Thanks guys, I really appreciate the info to date. Just a bit more detail for the technically minded amongst you. This mic setup is only for live settings, never for recording. In a recording environment, I fully appreciate the isolation issues. The overheads I'm using for live work are EV PL37's. They're quite well isolated as standard but will be fitted to some iso mounts I already have. Additionally, they're not as sensitive as some finer phantom powered condensers. I have four EV PL35's already on the toms, mounted via rim mounts. I've not detected any vibration issues with those from cymbal crashes & similar, even though everything is connected to the rack via some path or other. I don't mic the snare or hats. The snare takes care of itself in all but the larger venues & even then, the overheads do a really nice job. My snare is usually so loud, I get a nice extra benefit of reverb through the vocal mics!
What I'm really after is a pair of booms. Cymbal boom style but with the standard mic holder thread on the end instead of the cymbal nut thread.
Nice idea with the "underheads" Bermuda. I probably have too great a spread of cymbals for that to work well for me though. Plus I want some hat & snare pickup. Looks great on your setup though. Like you, I'm trying to keep the stage footprint neat & compact, hence preferring to mount from the rack.