There are several nice examples of ARFs designed around the PC-9 including versions from Seagull Models, VMar (distributed by Richmond RC), and the new Phoenix Models Tucano ARF.

The Seagull, Phoenix, and smaller Richmond RC ARF models are .46-size ARFs and would be ridiculously overpowered with a 1.00 4-stroke engine. This might be what you're looking for, but I'd advise staying with a .62 to .82-size 4-stroke for this size of ARF. It will still have gobs and gobs of power, but will balance better and not land too fast due to heavier wing loading.

VMar/Richmond RC does offer a 1.20-size ARF of their Pilatus PC-9 ARF. This should fly nice and scale with a 1.00 to 1.20 size 4-stroke engine, or it would be very fast something like a Saito 1.50 or a YS 1.40 4-stroke.

By reputation, PC-9 ARFs are popular because they generally fly well, can be flown gently or wildly, and they usually don't have any bad habits to speak of. I think you'll be happy with chosing a PC-9 ARF to fly so long as you don't go crazy putting too much engine on one.

Good luck and good shopping!