+1 AMD. *Super* happy with my R3600 build.

Long time since I built a PC and went on a *very* deep dive into specs and reviews. From that, My takeaway is that AMD will generally beat Intel in dollar/performance, other than in single threaded applications (e.g. gaming). Even that gap is closing (and from admittedly very early and AMD-supplied benchmarks, may have closed completely). If you're AMDing, you should be choosing between B550 and X570 motherboards. You might get some forwards compatibility in the earlier B450 range, but for the sake of $100 or so on a $1500+ build you should go with the newer option. You only need X570 if you need the additional PCIE 4 lanes. And if you're not running a high end processor and/or overclocking, you will be fine with most of the more mainstream boards. I wanted a MSI B550 Tomahawk, but ended up with a MSI MPG Gaming Plus because the Tomahawk was out of stock. I don't miss the additional features and the IO panel is probably better laid out anyway. MSI B550 range seems to review really well overall and you're likely safe picking the features and form factor you want from that range. MSI as a company you may want to make a more informed choice on.

In addition to GN already mentioned, Hardware Unboxed were my go-to reviewers for motherboards.