Swedes are great if you can get used to them (most people need two weeks of constant wear to adjust).  I've used Speedo Vanquisher for ten years and LOVE them!  The rubber makes a great seal (the trick is to raise your eyebrows like your in shock and then push them on the sockets of your eyes until they seal).  Goggles should seal so that they would stay on  your face if you pressed them on w/o a strap.  Like many said, get the bungie strap.  It costs a mere $5USD, but it makes adjusting tightness EASY.