Yeeah...well I also have a hard time decideing wich one of the Iwakis to go for.
There are so many to go for. These are the ones I´m looking at:
MD-20R(M)-N
MD-20RX(M)-N
MD-20RZ(M)-N
MD-30R(M)-N
MD-30RX(M)-N
MD-30RZ(M)-N
Here are some diagrams of there capacity: