I would say there's little out there to improve economy. Performance about the only thing that will get you a significant increase is an Alpine S/C, but those are scarce to non-existent anymore (those that have them either bought them a long time ago, or bought them used from other members). Handling is a matter of perspective; are you looking to increase off-road or on-road handling? If you're looking for the former, I would encourage you to use the search feature, as there's gobs of information on this site that's presented in more detail in other threads than we could retype here. If you're after the latter, I'm not sure what to recommend other than improved brakes (SS brakelines and drilled rotors are the most common methods we see on this site) and summer performance tires. OEM shocks were pretty tight to begin with, so unless you're going to do something pretty extreme (from a visual perspective) like lowering, you're probably okay there. Hope that helps, at least as a starting point.