Advanced Tomato works perfectly on my R7000.

Most importantly, Manjaro has an unbelievably friendly and helpful forum, which as a newbie, you will be needing. Manjaro works out of the box, has multiple flavors, and can access the Arch user repository, so if you need any program, you can probably get it. Seriously, before deciding on a disro, look carefully at how their forum handles newbies. Especially stupid questions from newbies. Because you will be asking them. A forum can make or break your linux experience.