The hacked one is good for most people. It is true that the UPGDVD flashing tool from Pioneer will not let you downgrade and the 1.33 tool prevents you from flashing up from the hacked version of 1.30. This has been patched though. Go over to www.rpc1.org and look around
I would not recommend flashing at all unless you have a problem burning or just want to be region free.