I just wanted to update my own thread (since I can't edit it) for those who may be facing the same decision. There is a K4A available (adjustable cantable version) and FIST says skip the thumb break (pricey option). Also, I should be good stabilitywise with the single velcro clip (I'll mostly be wearing a 1.5" beltman with this holster) at 4-5 o'clock. On the K4(A), the clip screws won't be showing on top either like with other clips. As for the body protector, they said it's a popular option and while I usually wear a wife beater underneath, I'm going to get it as it's not an expensive upgrade. Even though it's a more pricey option ($25 extra), I'm going with ultrasuede again. I love it on my K5 pocket holster as it is great for helping retention, supposedly helps with any possible kydex cracking down the road and again, just looks cool.
All in all, I think I'll finally have my ultimate holster.
