I currently run two combo amps: a Splawn Super Sport 1x12 and a Dr. Z Maz 18 NR 2x10. For a while now I've been thinking of getting a smaller head (Marshall? Two Rock? Rivera?) and a 2x12 cabinet, mostly because I just miss the bigger sound you get when pushing multiple speakers. Thinking of maybe selling off my Splawn and getting a head/cab set. And then it occurred to me that perhaps I could just get a 1x12 extension cab and use it in conjunction with the internal speaker on my Splawn. Do any of you guys use combo amps with additional extension cabinets running at the same time? Any pluses or minuses I should consider? I reached out to Splawn and I can get a matching extension cabinet (unloaded) for just $300 or so, so I'm thinking of pulling the trigger. Any thoughts?