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I would recommend a custom SCT Dyno tune. Good driveability, much better product support, and depending on your and what your goals are, you can get it all done without buying a chip. You would only be investing in the tuning time. You could opt for a chip that could hold multiple tunes like the 4 bank SCT.
All you need to do is provide the mods you have made, and I can supply you with a "mail order" version of the SCT chip.