Unless you have a pretty darn good idea what sorts of woodworking you'll be doing, I wouldn't sweat the details of your first bench too much. Scandinavian/Klausz is fine, Roubo is fine, etc. You also can't go too far wrong with vises and hardware from any of the main vendors (Lee Valley, Lie-Nielsen, Benchcrafted).
If a Scandinavian bench puts a twinkle in your eye, definitely check out any articles and videos you can find about/by Frank Klausz, he gets a ton of mileage out of his.