Go Defi! very nice, but unfortuantely very expensive as well.
Dont go for Nismo as it is probably just as inaccurate, why? i am pretty certain it uses the same boost sensor which is probably the bit that is NOT accurate. I think they are just pleasing to the eye, but function wise, i dont see how they are different from the stock guages except for a bigger scale to show bigger amounts of boost.
I'm in the same boat, no idea what true boost I am running, no idea whether i should get an EBC or MBC haha the thing is i did the solenoid ground trick to get rid of the 2 stage boost, so would a bc benefit me? (perhaps as i dont think the grounding thing is working properly) haha