yeah I think its a little too high to boost it. Unless you babied it, but why would you boost it only to baby it ya know?
My si is at 195k and I was contemplating boosting @ 6lbs cause i got a SICK deal from a local shop for a complete installed turbo kit minus intercooler piping (kit costs about 300$) for 1500$ installed. fmu, turbo, mani everything. but i realized even with the h23 being a trooper and lasting forever that i'd probably blow it in a month.
so i decided h22 with an lsd and some meaningful bolt ons and light cams will get me where I want.