Keep the car you have. You already paid for the depreciation and it still only a 3 year old car.

That being said I only buy old used cars and that has served me well. I do all my own work. I've had a 98 Lumina for the last 8 years that as lame as it is just runs and drives too good to replace. All I've had to do to it over the last 75,000miles is brakes, tires, change the oil and replace the water pump .