I need your suggestions!

You could perhaps create a stackable look to make it more modern. Tons of vendors out there that do this. By your pictures, I can't tell exactly what carat wt. the diamond is but it doesn't look like you can go with a really wide band - that will overwhelm your diamond. There's some cool online stores where you can look for ideas and then take to your local jeweler. Good luck!!

 

I think it looks perfect. If I were you I would not change it, besides it is a gift. I don't think your parents will be motivated to give your more gifts seeing you do that.