I own a parallel SET and two pushpull amps. My favorite is a flea-powered pushpull that runs the 349 output tube. The best tube amp I've heard is a custom-built output transformerless amp followed by a pushpull amp running the extremely rare 252 tube. In other words, I don't have favorites that are consistently one topology.
I think the OP should broaden his search to all types of tube amps, not just SET amps, particularly because higher powered SET amps are quite pricey and none have sounded as good to me as the low-powered SET amps, which might work if high volume levels are not a priority, but, are probably not ideal given that the speakers are not near the 100 db/w efficiency level that is more suited to low-powered SET amps.