Here are my priorities for cases
1. Clearance and Space: Basically you need to be sure your graphics card and cooling situation are going to fit. You should be able to find measurements for both of these. I see that you're eyeing a AIO liquid CPU cooler. Those can take up quite a bit of space, mostly because of the radiator. You can also look up user reviews and see how cramped they felt it was. Also behind the motherboard tray is another spot to consider. If it's too cramped back there you'll find yourself cramming everything in just to close your case up. If this is your first build, you really want to go with something spacious or you'll end up fighting your case to make everything fit. You should focus on getting your build right and functioning the first time around. When you're more experienced you might be able to work with less space. If it's not going to fit easily you're just going to have a bad time.
2. Price: It needs to fit your budget. If your budget is large this isn't going to matter but for smaller budgets you'll have a smaller selection. Don't spend more than you need to but be willing to spend at least $60 so that you'll have a decent time building.
3. Features: This is kind of a preference thing as most cases will be at least serviceable by themselves. But there are things to consider. One thing is front side drive bays. Some of the more contemporary designs have forgone drive bays so be aware of that (I see you intend to install a BD/DVD drive). Another thing you might consider is hard drive trays. Most cases have plenty of these but you may want more or less. Some offer 2.5" SSD mounts in addition to the regular 3.5" ones. Some cases offer cable routing features that might make your build easier and more pleasant to look at. But most of the time these things don't actually make a huge difference and I wouldn't fuss about it unless you know there's something you need.
4. Aesthetic: It should look good and you should be happy with the way it looks. Of course it isn't your highest priority but you should be able to look at it proudly. Many cases feature windows so you can look inside. Some are really minimalist, pick the one that suits your tastes.
As for your build, it looks pretty solid. I would say that you don't need a liquid cooler. Probably the only situation that calls for an AIO liquid cooler is when fitting an air cooler just isn't going to work due to fat RAM heat spreaders or something.
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Motherboard is a little on the cheaper end but it should get the job done. It should work with the 1700X without any issues but I wouldn't expect much overclocking on it.
Your PSU has much more wattage than you actually need. You can safely go down to like 550W, if you so desire. But it's fine as is.
Do not buy a sound card unless you are absolutely certain that you need it. The common sense here is that most onboard audio is going to be sufficient for 99% of users. There are sound cards that will give you better sound, if you care enough to spend on them and that's the exception.