MOTM

Hi all,

I'm new to your group and have just begun work on my MOTM synth.  
I've just finished my cabinet and power supply and expect my first 
shipment of modules any day now.  My cabinet can hold 20 rack-spaces 
worth of modules, and my current plan includes 13 modules.  I will 
definiately be building the 440 filter and would like to include 
another but I'm not sure which one.  My question is: has anyone 
heard/used all of Paul's filters and prefer one over the other?  
Also, is the sub-octave multiplexer a must-have module?

I welcome any/all advice.  Thanks!

Matt