I would not go the route of turbo charging, running forced induction will cause more wear and tear on your engine regardless of how and what forged or billet parts you have in there. I would say supercharging is less maintenance required than a turbo since you have vacuum to pressure and more gauges required to monitor. Its really your call, but running the stock eaton m62 with the engine built a bit stronger, you will have less worries than a turbocharger setup.
2009 Cobalt LS XFE U74
Mods: K&N Typhoon Intake, Option Cat-Back Exhaust, Cosmo Short shifter, Maxxim Ahead 17X7's, MPx shorty antenna, FE5 Strut/shocks, Tein S Techs, Moog endlinks, Moog spring seaters, ZZP shorty header, LSJ downpipe, LNF front grille