Kind of depends on what you intend to shoot. I don't hunt, so my rounds just have to be powerful enough to poke a hole in a piece of paper. I'll take accuracy over velocity any day. (Good thing I don't have a sister.)
A chronograph would satisfy curiosity about bullet speed, but I'll let the target tell me if the load is good for me and my firearm. If you're intending to hunt I'd say knowing bullet velocity is much more important since it has to perform once it gets there. Many bullets have a velocity window in which they will properly mushroom.