Way back when, Doc B challenged me to come up with a "SEX amp using a DHT". This was when the SEX was monoblocks with parallel 6DN7s per channel, and only the Afterglow had a DHT. That turned into the Paramour, released in 2000 I think. The whole idea was that DHTs seemed to have a sound that indirectly-heated cathodes could not quite deliver. We pretty much all agreed that the DHT feature was worthwhile, and the Paramour became my first complete design for Bottlehead.
That opinion has not changed since. Doc B was the motive force behind the BeePre as well, for the same reason, and IMHO he's right again. So yeah, I also say go with the 2A3. There are three ways to use it with subs; perhaps I should write up a simple white paper on the subject since it has come up a few times.