You have a lot of tender fresh new growth. You don't have your prefered future potting media on hand. I would wait. Get the "proper mix" on hand. Get several pot options, each of a different size, not so much about color. Once you have your equipment together, only then consider repotting. The time to repot was immediately before or the same day as the hard prune back. Now your best bet is to wait for early spring. THough if you have mild winters, with very few days below freezing, you can probably repot in late summer or early autumn.
About pots.
@JudyB is right, champion level trees are usually displayed in unglazed pots. But trees that are just below the top level exhibition grade are often shown in highly ornate pot, sometimes bright colors, but more often intricate scenes or brocade patterns or elaborate complex glaze colors. If it is a solid color pot, it is usually pretty dark, blue is a favorite. If a light color, often not a glossy if a light color, so a matte white or off white, Glossy reds, glossy browns are not usually used as they can overpower the flowers. Mixed color glazes, like oribe, namako, both which are blends of greens & blues, are often used for azaleas. Look up pots made by Bunzan, his glazes tend to be blends with bits of blue, green being dominant, and reds, golds, and other colors as accents colors in the mixed glaze. Ornate hand painted scenes are often used for azalea too. So pot choices are all over the map. There is no hard and fast rule, except the pot should be slightly less gaudy then the azalea flowers.
The olive colored pot you chose earlier would work quite nicely with a scarlet orange-red. If it was the right size, it would be a pretty good match.