I think thats a little high of an estimate of the price of the set-up.
I bought mine used and payed 800 for it. Worth every penny.
A new one is in the 2000.00 range I believe. No dought it wouldn't fix your current proublem but, it would help in the drivability and overall power output would be much greater than the stock set-up can muster. No, it's not the best compter on the market but, most of us can have it installed in under an hour and it'll get 95% of the power out of your setup. Changes such as turbos and exhaust don't require retuning.