I would say for the type of glock, go pick up a few and see how the feel in your hand. You may not like the 26 but the 19 feels great so it really depends on which is a better fit and what caliber you are looking for. On price Gen 3's are about 499ish and Gen 4 539-600ish depending on options and your LGS/dealer.
"Regardless of whether justified of not, you will feel sad about killing another human being. It is better to be sad than to be room temperature." - Joe B Fricks.
01 FFL, GOFFA, NRA, GOA, IAVA, VFW, ABATE of Iowa D15.