| None of your choices have engine work. If 500hp is a must then why pay top dollar for something that would hold value better if left intact (60k orig miles). 500hp on pump gas for "daily" use? I would go with #1 since it is the highest rated out of #1 and #2 (9/10), and none of the options will directly support your goals from the start. Take the 4k difference and go to town! IMO, start with breather mods, tune, stop to enjoy until your stock turbos run themselves out, drop an IPP stage 4 motor and upgrade turbos, retune, and enjoy!
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