I chose the BAT because it had extension, dynamism, detail and bass control like Ive never heard before. For the first time I found myself listening to music rather than an amp.
You didn't mention why you chose the SE version, which uses the 6H30 supertube over the non-SE version that uses the 6922 tube. As has been mentioned by others in this thread, the 6922 version of the BAT will give you many more tube rolling possibilities, and you will therefore have a greater opportunity to shape the sound of the amp to your taste. Having heard components that use both types of tubes, I believe a good Siemens E188CC (6922 drop in replacement) will provide a sound very similar to a Russian 6H30. On the other hand, a Mullard E88CC will make the BAT sound quite different than the SE with the 6H30, and to me that's a big advantage.