Wow! What a lot of replies! I honestly didn't expect to get so many helpful replies. Thanks everyone!
Now then,
@tunnelrat I have just heard about some issues breaking sigs in, along with the high price point of the 224. p30 honestly was the gun I wanted for about 2 years until I realized that there were just as good guns out there for half as much, but with the SK's price I'm reconsidering that notion. I don't know much about the SK though and I prefer the decocker on the sig because it decocks slower and seems more pleasing to use.
@sigarms228 Like I said with tunnel rat, my issue with the p30sk is more of worry that it might have issues I haven't read up on yet. I also slightly prefer the slower decocker of the sigs. It's good to know the p30sk might be good though; because I fell in love with the p30 the first time I saw it, but she was a little too pricey to consider given the competition. (Also the P30sk's specs aren't easy to find, it appears.) Oh, and I have very little actual experience shooting. I shot 50 rds of .40 s&w last year and that's it. Most of my knowledge comes from watching a lot of youtube videos. This time last year I didn't actually know how to work a pump shotgun. : P
If you look at used pistols, Sigs can be found around the $500-$550 range (and HK's around $600). I bought a P239 NIB and have had zero issues with it (not counting the couple of times my thumb inadvertently rode the slide release). Fits my hand well, and it's sort of in-between a single and double stack in terms of feel IMO.
HK is another great brand, and personally I think they are worth the price. I've owned two (P2000sk and USP Compact), and have shot four others of various style. The P30 is one of the few full size pistols that feel like it was made for my hands, and the VP9 is good if you decide to go for a striker fired pistol. HK have some negatives (price, trigger for some, size, etc.), but reliability is not one of them. HK and Sig are the only two handguns I've owned that have not had a single stoppage. Decockers work equally as well too, and I didn't have an issue with the one on my P2000sk V3. You should never be in a hurry to decock a DA/SA (and certainly never while on target), so I wouldn't consider that a major drawback. Also, the decocker is located near your thumb on the USP line, should you decided to go that route. But note that HK does not make a true Subcompact, at least not in my eyes.
With all that being said, I think the best thing you could do would be to rent as many handguns as possible at your local range. Many places charge a flat fee of $10-$20, and allow you to swap out firearms as long as you buy their ammo. I'd try some striker pistols along with DA/SA to see what you prefer, and remember that your preferences may change. I went from a steel frame DA/SA, to SAO, to polymer striker, and back to DA/SA over the span of 10 or so years. IMO DA/SA is tougher to shoot initially (compared to something like a Glock with a consistent pull), but you may feel differently.
Either way your ammo cost will probably exceed the money spent on the handgun if you enjoy shooting, so get something you like! There's not a whole lot of things worse than having a gun that just sits in your safe, while you lust for something more. Good luck!