CSRobe02,
It all depends. I own a 97' Mitsubishi Eclipse RS and it's a great car. Good gas mileage, cheap insurance, and one of the more reliable cars on the market.
Now, it's not brand new, but you can find a used one with lower mileage for a fair price. They run in the 4-8k range from what I see nowadays, and this is for a 97-99' model.
Now, if you're still wanting some decent power, but good mileage and reliable, I'd recommend the Mitsu GS-T or GSX( IF you want a Mitsubishi ). May I add the GSX is AWD, which is a plus. Both are turbo, both are 4 cylinder with nice power, both are reliable and cheap. Still in the 8k or less range. If you read around on many Eclipse boards, you'll see that this is a good car and is underrated greatly, IMO.
When it comes to purchasing a car, you must be cautious and decisive, not to mention fun. Just look around and you'll find something fit for your needs and a good price range.
HTH.
BTW, I'm estimating my car does 20 mpgHWY/ 17-18CTY, which is good for a car with 100k miles. Insurance for me is 600/yr. w/ StateFarm, not bad at all.
Alex