i was actually still hitting full boost (13psi) around 3000 - 3500rpm. so not that laggy, very drive able. i found that it still came on boost around the same time but just kept pulling through the rev range instead of flattening out like the stock 32 turbo does.
and Mike, like everyone has said. get a full exhuast setup, put the R34 SMIC on or just get a FMIC kit and put the on, get the ecu chipped or even just a fuel computer like the SAFC in and tuned. set the boost to 12-13psi. definately get a new fuel pump, as yours is 15 years old or older and will probably be on its way out soon (p.s. do the pump before the tune ) stock injectors will be ok on this setup. and as GTST hs said, it should see you around the 180rwkw mark.