All great advice! Thank you all! I knew the gun gurus here would help.
1st, to clarify, I am just an average guy who conceals. I am likely never going to pull that little pistol out in a real situation. I have practiced situational awareness, avoiding conflicts, identifying suspicious/dangerous people/situations for decades. That is why I chose a small but powerful pistol. I am way more likely to walk the other way or even run away from a conflict than I am to pull out my gun. I also have tons of active and frequent shooting practice and have a good chance of solving a close range, one-on-one situation with 5 shots. That being said, the extra rounds are just a backup, just in case. Why not carry an extra cylinder or two worth of ammo? A slow reload is better than no reload at all. At least I have a chance.
2nd, I fully agree that a small glock that carries 10+ is a much better solution and it is on my shopping list. As soon as I can afford it, I want a G19 or smaller. As far as 357 sig goes, it's one of my favorite rounds. Great advice! I would rather buy 9mm though because I can afford to practice more often and get better at shot placement.
3rd, having a high-cap semi-auto allows me to solve a third piece of advice, the 2nd/back-up gun. My revolver would become my back-up piece if I buy the glock. Reload and back-up problem solved.
4th, until I get the semi-auto, a $40 magazine is actually pretty quick to use for me as a reload. I reload with my right hand while holding the gun and cylinder in my left. I am used to rotating the cylinder as i feed rounds in with my right hand anyway and dare say I'm pretty quick at it. I could do it in the dark/blindfolded. My reason for wanting speed strips or a magazine is cuz they will keep my bullets in line and make it faster. As of now, they end up in a pile in my palm and it takes time and attention to orient them. I guess it's a good idea to first buy a couple speed strips and try them out before buying an expensive DE magazine.
5th, customizing my grip to accommodate a speed loader: I will consider this and look up people who have already done this with my model pistol. I would like to keep my gun pretty but I've always said "function over form". I do like this idea best of all so far, ar least until I get that carry-sized, high-cap, semi-auto. Thanks to every one of you who commented. My ears are still open