Well it really all depends on taste to be honest , IMHO I would say it has to be vortec , You can have a 4 door a bit cheaper than th 2 doors as they are more rare. they are pretty tough trucks so the usual Oil, Trans fluid check those, I will go ahead and tell you that the gas gauge will be faulty lol, On top of some other issues , you have to figure these trucks are getting up there in age now , so most minor things that you would normally not have to worry about start popping up , as for mileage the engines in these things are pretty solid not uncommon to see them 200 + with no issues,