Often I find bass controls are voiced too low IMHO - e.g. on the Stingray. Also I've tried a couple of sweepable mid pre-amps (not Ibanez mind you) and I found the band width was too narrow. OK if you were cutting, but if boosting it was too honky. I know Wal's seem popular, but I couldn't get a good sound out of the circuit when I tried one.
I've had a Spector, Status and a Sandberg all of which had nice voicing. Also Overwaters have a nice EQ - not too drastic. I'm currently waiting for an Audere for my Fender Marcus V, so will see what that's like.