Since respec is so cheap if you expect to 5 or beyond in a martial class I would recommend going straight for that. You can get level 5 about 60-70% through Act1 and that extra attack is worth making a beeline for. Then as you get more levels to play with you can just respec to the best class to start with which is usually Rogue if Rogue is in your build because it will mean more skill proficiencies total.