You'll get away with a small turbo upgrade, but sc42 will be too much for the stock engine. much more than a 36 an your gonna need to have the engine rebuilt.
How far you go really depends on budget, my goal is a reliable 500bhp so i've got a closed deck converted 2.5, forged pistons, uprated rods, acl bearings, arp headstuds and supertech valve kit in refurbed v5 heads along witha boat load of supporting mods like FMIC, syvecs etc