I'm going to also chime in and say that there are many cases of people not dying from .22's all the way up to 44 mags.Carry what you know best and have the most practice with.
I carry the .40 cal with fed 180 hst's,i'm fixing to trade my ammo out for Winchester Ranger 165 gr sxt or better known as eagle talons.Paid 28.50 a box of 50 rounds from www.tds-us.com
Btw you can also order fed 180 gr hst's for about the same as atg.
I'd stick with the HST's personally. Every test/review of SXT's compared to HST's has had the HST's coming out on top. Whatever makes you happy though