I love both your boys names so i think you have good taste! I like Jett too if your haviing a boy
i was gonna suggest Madeline over Maddison if u like Maddy but want a bit more but a few have suggested this already.

some other names i like:

Ebony
Dakota
Jemma
Mackenzie
Marli
Maya
Niamh (neev)
Naeveh
Phoenix
Peyton
Savannah
Sienna
Sierra
Summer
Tirane
Tarlay