Future project: Front porch containers

It's usually around this time of year that I start to get an itchy green thumb. The leaves are starting to pop out and things are starting to grow, and it sets my head in overdrive thinking of all the new plants I want to try in the garden this year. So far I've had my heart set on growing something like this (as seen in Fine Gardening):It's a really nice mix of textures and colour using Canna lilies, ornamental cabbage and kale and some creeping Jenny. I want to put two of these on the front porch, and I've been eyeing up Ikea pots (Mynta) that could work:

I'm trying to decide if the terracotta or white is better to use. hmmmm...