I've been trying to find a good HH style bass, trying to match the punchier tone of a Wal ( I dig the sound of HH anything really) and the list seems a bit slim. I just want to know if the twin soapbar pickups are the same punchy sound of MM pickups, just different looking shells, or if they have a sound all their own.

Make sure you check out this thread:

http://www.talkbass.com/forum/showthread.php?t=276129

A good discussion of a new filter based preamp -- similar to the Wal. And there is also discussion of the Wal's pickups.

Hmm, neat. Now I just need to get a bass to put that in... (goes to look for a TRB 4 or something...)