Zoiks! Cerwin Vegas are super efficient, and pleasant sounding speakers. I'd say it's a shorter and easier path starting from scratch than trying to monkey with a design that's been optimized to sound a certain way.
CV's woofer cabinets tend go for the rock-the-house bass, which isn't too condusive to tweaking in accurate mids and tweets.
I've kept my DCMs, which are kind of similar to the CV's, and they still come in handy for playing loud parties (my high accuracy speakers are dreadfully inefficent). The DCM's are also very forgiving when I play some poorly recorded music, and the CVs tend to be forgiving as well.
That's my 2 cents.
I expect change.