Just my twopence-worth, I've had a BIg baby T and now a Big baby 2. I know everyone has different tonal ideas, but i found the Tonehammer pedal into the power amp of my Shuttle 9 a bit lacking in clarity and not enough range of mid adjustments with the big babies. I also found my Streamliner 900 horrible in the mids with the big baby T, yet it was good with my Midget t. If the original Big One is similar sounding i would look at something a bit brighter than the Aguilar. Genz Benz shuttle 9.0 worked well as does my Shuttlemax 9.2, but i really like the MB800 with BB's, perhaps the fusion is the way to go. The SWR is also known for being brighter...haven't tried one, but it may be good. You need a bit of power to drive that cab, so again the fusion has more power than the Tonehammer 350. Good luck with your choice!