good car for the money yes...
miles are low.. it will last a lot longer with the stock motor...
Power with light mods... NO... ya need to swap or do some kind of forced induction to really get more than a slight ammount of HP.. (even taylor's monster twice cam motor really isnt a LOT of power over stock, but more than others usually get with more mods)
With a basic boltons swap for a few grand, you can expect high twelves (read 12.90 or so) if you can drive.... for aobut 6000-8000 dollars expect elevens and 350 or more to the wheels.
Im sure the others will chime in with more exact figures. but these are fairly close
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I dont feel like a sig today.