Yep I way love the Sophia Electric™ Princess Mesh 300B, I run one in my 1/2 of my WOO headphone amp WA-6SE.
They truly are great sounding, they even have a few nicer tubes, out of my $$$$ range for 1 tube.
I am sure that those Western 300bs are amazing too, lots of air and separation, dead quiet noise floor too..
I would love to try the Royal Princess version too
http://www.sophiaelectric.com/pages/se/royal_300B.htm
Maybe I can call and get one and not a matched pair to test out.