I have a 100W 115 combo, a "Session Sessionette" - I've never heard of it anywhere else, but I quite like it. I reckon I need an extra cabinet though, to give me some more mid-range power (for my effects) and to help a bit with volume. I think I want quite a hifi sound, though I'm not sure. Which cabinet would I want though? What would be the pros and cons of each, with my 115?