I've gone ahead and ditched the Supertones and installed Babicz 3-Points on two of my Thunderbirds. UK price is £120, so c.$171.
While I have nothing bad to say about the Hipshots, I've gotta say that I like [edit] the Babicz bridges [/edit] a lot...the basses do sound phatter; there's just more of everything tonally if that makes sense. Also, they're certainly kinder to your right palm if you mute or play close to the bridge.
P