Esoteric A-100 vs a03

Friends,
I am currently using a Wavac 300B amplifier with my Tannoy turnberry SE speakers. While I am enjoying the luxurious Wavac ride but there are always times that I feel the 10 watts Wavac is not enough. Especially while listening to Rock and pop music when I would like to crank it up and have fun, the music doesnt sound very comfortable. I know I should not be doing this with a 300B tube amp but then I listen to all kinds of music and I dont own a 100db sensitive speaker.

The choice is now either to go with a powerful push-pull which has the overall purity of an SET or a more drastic step towards a good solid state amplifier. I have heard the Esoteric a03 and liked it a lot driving a pair of Maggies. But I have never heard the A-100. Esoteric says that A-100 sounds as pure and neutral as master tapes, thats a serious claim, but then they are manufacturers. Can anyone here give me an idea of which of these amps would be a better buy for sonic purity, neutrality and dynamics ?