I am currently running a SM400 with a 210XLT. I am really liking it but I am finding that I don't have as much headroom as I would like. I am planning on getting a David Eden 15 and I am really doubting that I will have enough power for that. I really like the head I am running so the question I want to ask is can I get an additional power amp and run it along with my current rig? When it comes to tech stuff I am a little slow.