The best arranger to use in a live performance....hands down...the G1000..
The followers in no particular order..VA-7, E600, SD1,X1..as for the Yammies, I got tired of holding my breath, wondering if the wrong drums will appear with a SMF..
The Korg's are in the lower group too, because of poor searching of files..

Like I said, nothing beats the G1000..