ACG vs. East Preamp vs. Flexcore? Looking for versatile preamp

[Lucas Redekop]

I like the sound of my Ibanez SR506, but seeing as it's my main bass and I play a lot of different music, I'd like to upgrade the pre to something that will give me a much larger tonal palette.
I'm looking for any comments on any of the preamps I've already mentioned as well as other ideas for what I'm looking for, price isn't a huge issue. Thanks!

 

[bkbirge]

I'm pretty happy with the ACG EQ-01 I just installed in one of my basses. About as versatile as it is possible to get I suppose. Lots of knerbs...

 

[mjmeche]

I put Mike Pope with H/L mids and act/pass sw love it

 

[modder5s4s]

I put a flexcor in my fender while keeping the N3 Jazz pickups. It took the overall sound to the next level. Volume-tone, blend, bass-treble, high mid-low mid, active-passive switch has given me great versatility and clarity. Here is a link to some different preamps and pickup configurations and how they sound.

http://www.youtube.com/user/elguitars?feature=watch

 

[mjmeche]

I did a vol-act/pas, vol, bass-treb, hi-lo mid, pass tone-coil tap