Quick answer for astrid cos I gotta cook dinner - the option A is in Riverside - option B would be someplace like Hadspen or Evandale/Perth/Longford.
Ah, now that helps.
I would go option A. Riverside is quite nice and the schools are good. The buses there were reasonable for Tassie standards.

If you were to go option B, you would need to check out which highschool each town goes to. If it is Cressy, then no way. I would just never go Longford, but that is personal, DH grew up there. Never got good vibes from Perth for some reason. Evendale is nice, so of the 3 I would pick Evendale. Not too sure about Hadspen.

Ok, my main recommendation. Wait. Get to know Tassie a bit better first before jumping in. There are lots of great little places about. There are some great spots down the Tamar River.

Have fun deciding. I know when we looked at moving back, there was always someone who did not like the areas where we were looking in.