sorry to hear about it
when you were getting it turbo'd, did you check the block if could take such power?
normally going with turbo means modifying other parts which can actually take pressure and torque
your mistake (if we call it that) was to rely on a mechanic who is used to do work on NA car's, you should had gotten the work done from a person who actually knew what he was doing
anyways its a lesson learned, as for my advice sell the engine and go for the k20 like farrukh did or sell the car and go for a rx-8 which is cheap and will give you enough thrills to keep you happy for a while. It totally depends on your budget possibilities are endless if you ask me