Well, it looks as if my due diligence is starting to pay off...
Earlier today I spoke with a guy from G&L. Then I spoke with a guy from Ernie Ball MusicMan. I also searched a bunch of additional threads here on TalkBass, gradually digging in deeper & deeper on detail.
It's looking more & more like an ash/maple L-2500 is in my future. What I'm picking up is that the L series has a somewhat
compressed feel to the tone, phat & powerful, with a thick, snarling, midrange-heavy tone that remains impossible to completely tame.
Sounds good. Wild is good.
By contrast, the M series is reputed to have a major-league "B" string, with a more relaxed midrange, and more open and extended high frequencies. Sounds closer to most of the bass guitars I already own. But assuming this characterization is accurate, that's exactly why it wouldn't work - because I've already got that sound covered.
Not making any hard & fast decisions just yet, of course. But my gut tells me that the G&L L-2500 + EBMM Sterling 5 HH combination is gonna provide the devastating one-two punch I need for raucous rawk!
MM