Generally speaking most engines will take being turbo'd upto around 8psi with no internal mods. The up side to keeping the STD compression ratio is of boost lag is much less and boost comes on much sooner due to the higher temp exhaust gases.
If your goal is not to go mad with what you want STD is the way to go. I would recommend getting the mapping sorted with stand alone ecu. The key to keeping things realiable is having them set up correctly.
Running lean on any boosted engine will kill it very very quickly!!! Like wise ignition timing can kill it just as quickly... You will find the ignition will be dramatically retarded once on boost.
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