I got b16a2 in my eg fully built to run 25psi...i've only taken it to 7psi so far and rebuilding it atm (new rings and bearings) but i will only ever take it to 20psi as its not that safe to go past that. This is my third rebuild in 3 or so years since ive gone turbo and trust me i would be more than happy to run a K Series in my EG over my Boosted b16a2 anyday. With boost there is soo many different driving setups, sized turbo's with earlier spool less power and later spool more power etc. Its hard to get the right power curve you like. With a k series, its just all motor. Power will always be similar from the getgo to redline and it will always be there when you wanna play with it. With boost its much different.

There is much more potential power in a boosted b series but if you did quite a few NA modds to a K24 in an eg your bound to hit mid 12's. and to me all motor 12's sounds much better than a boosted b series.

K24 will last 200,000kms+
Boosted B can last from 5,000 - 100,000kms depending on your build setup, your turbo setup, your tune, your fuel. So many variables.