Congratulations on your engagement! Great news!
This is a tricky one.
I think the I colour will only be noticeable if you place it next to a D/E colour diamond. I cant see the warm tinge on an I diamond unless they are placed next to something of better colour.
So it also might depend on which type of wedding band you go for. If you go for a diamond band it might show up, but if you go for a plain band it is less likely too.
Both are lovely, and both look great on you. No matter which you decide you cant go wrong
Good luck and enjoy!