bro dkny,
what is the real question now? do u just want to monitor the boost or are u going play ard with your boost setting?
because if only the analogue gauge, u can only monitor the boost level but u unable to play ard with the setting.
most of the new boost controller (electronic type) comes with the display. this kind of boost controller can let you monitor ur boost level and at the same time can adjust the boost either higher or lower.
for me, i have both of them but rarely used the boost controller to monitor the boost. personally i prefer analogue type to monitor the boost