I've been looking at the Bag End 2x10 ELF or whatever it is called now with considerable curiosity. Is that the 2x10 you have?
I too, am looking for a way to get way more portable AND preserve or even improve bottom end.
10 subbass drivers sound like an impossible dream to me, but I want to believe. I am a dinosaur from the generation that believed 15 JBLs were the only way to get clean, deep bass.
I only recently started playing again and the first thing I did was to build several single 15 enclosures. One of them actually puts out monumental, clean bottom end (out of an old CTS 150 W speaker), but that's because the cabinet design is detuned (see London Power's website if you are not familiar). Detuned cabs are arguably the most economical and efficient way to go -- BUT -- In order to work, detuned cabs have to be MASSIVE (like 2X the size of a regular cab).
As much as I'm in awe of the low end my creations produce, they are a big pain to handle. What I'd really like is to be able to donate the 15 cabs to the bassman with my son's band (and be a real hero) and find a vastly more compact rig for myself (...a smart hero).
I'm also interested in how much juice it would really take to power a pair of 2x10 Acme's. I get the idea from Acme's site that if you have to ask, you don't have enough power. I'm playing a Hartke 3500 (Mono 350W thru 4 ohm, 240 thru

. Is that way too low (anyone know?). I'm open to more power if I need to, but the Hartke has good features and I like to tube preamp all in the same package.
Bill