The PS Audio BHK is really good, but I found it responds well to tube rolling - you really need to roll the tubes to get the most out of it. Since it does respond to tube rolling, I would call it a good tube preamp. I do like that it is a bit of a swiss army knife of a preamp since it has a large number of balanced and unbalanced inputs.
Overall, I'd say with stock tubes it performs below the LTA original generation; with better tubes about equal to the LTA OG. The LTA with the level 2 upgrade I would place above the PS Audio. Of course, if your equipment performs better using balanced gear, the LTA might not win in a head-to-head.