I'm in a predicament on which glock 19 to purchase. I'm pretty familiar with both and like how they feel in my hands. I found the 3rd gen for 509 with an extra mag and range bag. I can get the 4th gen for 540 with the standard additions. I am curious if the new recoil spring is worth the extra money and one less mag in my situation. I had looked at the sig p250 and sp2022 and the s&w M&P 9mm but the glock reputation is weighing on me. Thanks for your help!