Well I decided to give BFS a try and loaded V5f. I do actually see lower quadrant scores that with CFQ (V5e), using otherwise near equivalent kernels (SVS 1113) and with same governor and clock (smartass, 998 MHz). General performance seems OK (on basis of a few minutes' playing, nothing more), though not visibly snappier.
Funny thing is, my phone doesn't seem to like the HAVS kernels at all - I tried the 925 mV versions of both V5e and V5f and ended up having to restore on both occasions (bootloop). No problem with the SVS versions though.