Since my original post, I've become quite the fan of the Babicz. I've got one on my fretless Precision and one going on my HoseDragger Custom. I got both of the ones I use for about $60 apiece, so the price was right. I still haven't tried the KSM, mostly because I can get a better sonic bang for my $150 with many more things than a bridge.
I'd still give the KSM a try, if I could find one used for $80 or less. No comments, though, on the Hipshot Vintage. I have a brass Ric-style one on my 4001, and I like it real well.
Where did you find a Babicz for $60?