I'm thinking of pairing my ampeg 810 with either a svt215e or a single 18e with an extra 410 or single 15. i'm trying to boost my low ends and the 810 by itself isnt giving me what i want. i run an ampeg b2r-e head. does anyone have any suggestions on which setup would be better? would my head be able to handle either of these setups? thanks for the help!