Cool :D
I can see the point of modular amps - satisfies one of the things that modellors provide... but with real amps!! :D
But I tend to gravitate to one amp tone and then use the guitar(s) to vary it. I had a switchable amp for a while years ago, and I just couldn't get my head round balancing the thing for effective use in a live situation... but nowadays, if I had the space and ability to turn it up, I could probably be tempted to start messing....