Congrats on the purchase Pyroteq, I'm watching with interest as you work through the teething problems with it.
This is a great thread for me as I'm sort of in the same boat, although a little ways behind you since I've still got to get my licence (pulling finger out in next few weeks).
I'm also tied on a decision between these three (after I've got my licence and first PTA), and also looking to use it mainly for target but also for pest control on my place. I've been leaning toward the 101, but I'm still undecided (FWIF I'm also contemplating the Styer Zephyr II)
Some great info here, and looks like a great forum in general. Looking forward to learning heaps.