Tennis bracelet: Thanks for your advice. I want to wear it every day so I need the "presence" but don't want a too high-profile one.
A halo: umm... You should once try a hallo look! Your diamond (1.25 carats) is good size to go halo. You can have a really good, big halo ring! If, IF you are tired of the halo setting, you can go back to a solitaire and you can create a celebration ring with the melee diamonds.
WHY?? Some women are not just interested in diamonds, but others are just diamond girls!!! Me, too! Why I lost interest in a halo look might be that I am comfortable with the size of my solitaire (2.4 carats). I know some are not satisfied with 2.4, but I am totally happy with my Tiffany classic solitaire. The thought of re-setting it will never cross my mind. I feel stable.
This is strictly my own personal feeling, but the branded jewelry has this power to make you(me) satisfied with your(my) diamond not only size-wise.