The bass player in our band has a Trace Elliot pre-amp with 8 ohms out that he really likes and a 4 ohms in Ampeg SVT410HLF Bass speaker cab. With this as the ground work what would you bass players out there recommend as a good idea for an in between amp head or power amp to get the most out of this rig on the cheap (under $400)? looking for good clean and dirty tones. This might be a stupid question but I don't have much experience with bass rigs. thank you.