Just took a quick look, again I leave it to you to determine which one based on price, features, reviews, etc. I only looked at the ones from be quiet, ASUS, Cooler Master, Corsair, and Antec, as those are all good brands in general, but of course you need to determine which of their PSUs are good and which aren't. All of the ones from those within your price range except one offer 40+ amps @12V and should therefore be more than sufficient, but of course, all else being equal (price, quality, etc), you should go with the one with more. So the CM 500W Elite V3 has the least with 38A despite being in the middle for cost (and it doesn't have an efficiency rating), the CM 500W V2, Antec CSK550, ASUS TUF 550W, and be quiet 500W are next with ~40-46A, and the rest are all ~50+ A. The CMs with efficiency ratings are only 80 PLUS, whereas the be quiets all have 80 PLUS Bronze, which isn't much of a difference but it is slightly better. One of the Antecs is Bronze, one isn't, and the ASUS and Corsair are Bronze. So the CMs just seem like poor value overall between efficiency and amperage for the cost. The be quiets give you a wide range of choice to help with budget and getting what you need, and they make excellent fans, but I don't know about their PSUs, so you'd want to do your research looking at reviews, which you should do for any PSU before you buy it. Just going off the numbers, I'd rule out the ASUS and the CM 500W V2 and V3 for value, as they're among the lowest for power output yet higher in price (that said, the reason may be that you're paying for quality, so if they're much better quality, it may be worth it). Out of the remaining, any would work, but if you can get more amps and/or better efficiency for the same price or slightly more, you should do it.
You also need to look at the connectors and make sure they have what you need, e.g. if you're running lots of HDDs you need lots of SATA connectors (you can always use splitters, but that's more cost, messier, and you need to make sure to use good ones that don't have a risk of melting). Also look at fully modular (unlikely in this price range) vs partially modular vs non-modular. Modular ones are nice because it's easier to do cable management and to replace the PSU if it fails, but you have to be careful to not use the same cables with other PSUs unless you're very careful and check the pinouts for compatibility. Modular PSUs also allow you to use/make custom cables if desired. It looks like the only one there that's (partially) modular is the Antec CSK550, so that would be the one to get if that's important to you, but keep in mind you're paying for that feature, which is apparent considering it's the lowest power output of the remaining choices after the previous eliminations yet is slightly higher to the same cost as others with more output. And, of course, just because it meets the requirements and is modular, that doesn't mean you should automatically get it, as you still should check reviews first.