what setup for sohc to keep up with high end HP

k, i got a 00ex with greddy turbo kit with vortech fpr and missing link and apexi WS exhaust... the car pulls real good on stock boost but not enough to beat a v6, gsr's, on long run... they usually get me on top end.... or i'll get a bad start and its very hard to catch up sometimes... how many pounds of boost should i have in order to keep up with GSR and vtec preludes. and what kind of set up should i go? im very practical.. i just want something that will keep up or beat GSR and others.... i used my car daily so i really cant go all out and cash is also an issue... but whats the best route for me? thanks