Quoted from Coolpinballdino:JJP machines tend to need more maintenance than a stern
Other than some issues with the early WOZ games, I'm not aware of any persistent issues with JJP titles, and I know of games on location that have been relatively problem free.
As far as OP's question, I'd pick Dialed In from the JJP lineup, but if I were not confined to JJP, I'd get an MBR. Even better, dump the Kiss machine and get DI *and* MBR.