I have been playing out of a Behringer 4500 head and Kustom Grove Bass 2/15 cab and, frankly, the head has been good. I am a long time keyboardist and vocalist but was challenged by my group to play bass when we lost or bassist. I bought a Schecter Custom 5 and Carvin Custom shop 5 string with an Aguilar preamp which is my bass of choice. I turned the Schecter into a C string 5 string which I use for more mellow stuff. Anyway, I just bought an Ampeg B1RE head because it was $299 on MusiciansFriend...no tax and free shipping and it will arrive next week. Will I be happy? And, it appears there is no selection for active/passive bass...is that a problem for the basses listed above which are both active?