I would say the top amongs Boards now is the IBU3 and the Clark TK 60 ( I must confess and say I have not tried Emod ore asp Board )
IBU3 now uses pc setup, and once drivers and software program is installed , the process of setting up the Board and changing out sounds is pritty straigh forward. The software program is easy to understand , and have buttons for each step/Programming you want to do .
footprint is a tad on the large size , sound vise it's a good step up from the IBU 2-pro , and now stores the soundslots on flash, rather than IBU2's SD card, and this means it has great transistions between the sounds steps . easy uppgrades via usb dongle, and Ivano allready have made it it
Here are a few 'sound' video's of the IBU3
TK60
the New Clark Board now have ability to change soundsets by enduser, and uppgrade software via usb programmer. footprint is smaller than the ibu3.
the Programming software is more Limited than the IBU3 provides ,and are With 'Asian' buttons ( atm ) but With the English manual explaining each button it's not that hard to uppload a New sound package. But still not so user friendly as the IBU3 software .
I use my Cards alongside With the DKLM-RC gearbox for the most part ( and 4/1 ) and they both drive pritty much the same .
TK60 soundsets