Also I would like to have a mid-sized recoil if possible (for my dad).
Both cartridges are quite versatile in there own ways. Either would be an excellent choice for your applications Woozze. But the 44 Mag is a bit more popular with the younger crowd. I myself would go with a 44-mag. Not because the 44 Mag is any better than the 45 Colt. Just a wee bit more modern is all. Reloading of either is quite simple and straight forward. But like Hawg Haggen has said: Six of one, half dozen of the other. Good luck with your choice Sir. It's a Win Win for you either way._