Got that itch again and have narrowed it down to these two great guns. I have the full size versions of both the Glock and CZ and like the idea of easily swapping out for higher capacity magazines. I use the CZ primarily for range time as it is too large for everyday carry (SP-01 tactical) but have carried a Glock everyday for the past 9 years. Any opinions on these two guns. Also I would be using one for a back-up gun.