I'm running a Greddy kit with some extras and better fuel management. The basic turbo kit without blow off valve and half assed tuning was 2750. The total cost of my setup is unknown, but too damn much that I try not to think about it. I installed everything myself and street tuned it myself, so the cost is cut significantly since I don't have to pay any labor.

It sure is nice having over 180 ft/lbs of torque by 4000 rpm, though. If you want low end torque with a decent high end, a small turbo like the 18G or equivalent is something that you should look into.