I haven’t heard AL5s, but I own LS IIs and have owned CW IVs. Here is the pecking order in my mind.
CW IV > CW I
LS II > CW IV
So I assume the AL5 is better than better than all of them.
It’s true that the Cornwall has deeper bass, but the LS has truer bass. The bass quality is much improved in the IV, but still bested by the LS.
Bottom line, AL5 gets my vote. And some would say, paired with subs, even over a khorn.