I have recently purchased an Ampeg Micro VR and the accompanying SVT210AV cab, but I want to get a tube preamp to warm the tone up a bit; I have been looking at the EBS Valve Drive and the Paia 9305HSR online, but haven't had a chance to try either. I am also going to add a second cab to increase my power. I am not sure whether I should get another SVT210AV, or go with a 1x15 for some extra rumble, but I have been looking at the Ampeg SVT15e and B115E. If anyone has suggestions about these items or some good alternate suggestions, I would love the input. Thanks a lot!