Trying to make a decision here for a small 200 watt @ 4 ohm amp head. It's between GK MB200, Fender Rumble 200 & Trace Elliot ELF. Going to us it with the speaker cab from a Ampeg B100R that has finally died. Tired of trying to get it working & spending money on it. Could have bought a whole bass amp for I have spent on it. HELP will be appreciated.