Not the answer you want...
If that is about your budget then I would look around for a Mk 2 FAS 604. It's a fabulous single stroke pneumatic. Very accurate and a brilliant trigger.
I just can't be confident with CO2 powered target pistols due to the power changes with temperature.
That said, the Tau is a very well regarded pistol.
The Mayor: Intent? How did you establish that?
Harry Callahan: When a man is chasing a woman through an alley with a butcher’s knife and a hard-on, I figure he isn’t out collecting for the Red Cross.