Nice v good choices 2LI's, Its a very well thought out 3, the 17 CF has more legs and energy than magnum rimfire for vermin at distance and is better than using 22-250 in some places for fox when one appears, a small holding I go on mainly for rabbits is inundated with foxes where 22-250 would be too much with the surrounding area for noise, 17 CF just fills that gap nicely.I think the same way as you, have 22lr for bunnies etc, 22-250 for foxes and 17 Rem Fireball which comes in handy on foxes if out after bunnies, effective but quiet.
I did visit Malmo guns the other day had a word with John Prest and he said better to opt for 22lr over 22 fac air, cost to purchase being one thing, might not get on with it and be a problem to get rid of/swap 1 for 1, cz452/Brno/cz455 easy to get one fully kitted with mod, scope even bipod etc much cheaper than a decent fac air.
AJ