Re: New Cab on the way... got a weird question...
These are what you want:
http://www.eminence.com/speakers/speaker-detail/?model=Delta_Pro_12A
Less high end than a EVM12L, but totally usable for guitar and would hold up for bass easily in that cab.
The stock speakers are totally decent for me in mine, but I don't have any plans to play bass through them.
+1
EVM12L's would definitely be the first choice for alot of people looking for a "Works good for bass and will handle the low end" and "Sounds great for guitar" sort of speaker....But the Delta Pro12A (not the Delta 12a, or Delta 12B, etc... Gotta be the Delta PRO12A), actually Works Great for bass, and Sounds equally great for guitar.
I have a Big old 68' Bassman Cabinet (the huge one thats bigger than a 412) with two Delta Pro12A's in it, I use it pretty frequently With my Bandmaster, or Bassman heads, for gigging, and recording. It sounds great whether its clean playing, Sludgy fuzz goodness, Crunchy Rhythms, or just weird ambient Shoegaze odd-ness.
What really surprised me though was...My Bass Player/Girl Friend's 410 blew a speaker a couple days before a show. So I Told her to use my 212 since I knew the speakers would hold up to the low end, and I just used my old Sunn 412 for that show. It was the best her bass ever sounded on stage up to that point. She still uses it pretty frequently at Practices, and at shows (when I'm not planning to use it).
The Delta Pro's don't sound exactly like EVM12L's, they don't have quite as much High end, feel a little fatter in the low mids, and aren't quite as efficient/loud (they're definitely still very loud speakers). But they're still very very close cousins at the very least. which sounds better for guitar would probably be a matter of amp, situation, and personal preference. I've never heard an EVM12L used with bass, so I can't say they'd do better or worse. But after having heard a Bass Played through two Delta Pro's (albeit in a very over sized cab, though yours is ported so it could have a similar effect), I can definitely say, the Delta Pro's are Great bass speakers, in addition to being great guitar speakers. The price doesn't hurt either.
Of course, that is just my opinion based on my own personal experience. YMMV
