Head Gasket Replace 93 RB25det - Pls Help

[kodurb25det]

im gonna put a OEM head gasket and ARP stud on my GTST. car is allmost stock. it got 3 inch turbo back exhaust, SARBER intercooler, and K&N pod filter.i had a oil leak from bck of the head. thats the reson for change the gasket. but the car was run really good. no smoke nothing. i did a compression test with T&E compression tool.results was

115:110:120:120:125:120

you guys recon i need a metal gasket...?how much boost u guys think with this set up...? [safe level]any body did this set up, pls let me know the toque specs for ARP studs...? or is it same as the nissan specs for RB25det..?re-toque is necessary with the OEM HG..?

thanks