I've owned one bart/bart bass (barts were soapbars) and two Bart/Aggie basses (barts here were all quad coil), and I have to say I'm a fan of both sounds. Bart/bart to me was hi-fi, sounded great as a solo instrument (wasn't a modulus, though). Bart/aggie seems deeper, or that it sits better in my performance mixes (pop/rock, funk, reggae, christian). You could always pick up a used OBP that matches your current knob configuration and drop it in. If you don't like it, you can resell it for the same amount, and you'll only be out shipping. I've noticed that the used market for those is consistently good...the used ones don't stay on the forum for long!