Mongo,
I own PSB B25's and T45's. Didn't care for SA return policy 'cause I knew what I was getting, and they are more a b&m store, rather than an online only reseller.
Yes, being somewhat forward and totally disappearing are PSB characteristics, and ones that, like your brother, I enjoy. I would say that in the B25 forward is more noticeable than in the T45 (tower); on the other hand the T45's disappear much better than the B25's. I wouldn't go as far as saying that the artist is only a couple of feet away, but that depends on settings, room acoustics, and personal appreciation. Receiver/Amp also plays a part, a small one, but sometimes noticeable.
In my case I have a Marantz, and IMO it gives the B25's better soundstage and image characteristics than with other popular receivers (ie. Onkyo, Yamaha, Denon).
There is an excellent pro review somewhere about the Alpha B1's, also great for less than $300.00, actually more like $225.00/pr. Anyways, the reviewer talks about PSB's general sound characteristics they give all their speakers, and how they incorporate them in their Alpha B1. It is for the B1, but will give you a general idea for the B25 and other PSB. If I find it, I will post the link.