Darlene:
I personally don't think this pot would complement your new azalea, even if the size fits. For one thing, the colors would clash when it's in bloom.
Second, the tree should be the focal point. Since you have an exposed root tree, the roots are the focal point of the tree. You don't want the eye moving down further to the pot.
Traditionally, azalea are potted in complementary colors to the blooms, or in unglazed containers. Just do a google search on "azalea bonsai", then click the "images" tab and you will see zillions of examples.
Then google "exposed root azalea bonsai" and see examples of other trees similiar to yours.
Now, I know you like to do your own thing, but there's ways to express yourself even within the boundaries of "traditional" styling. Subtle things like the shape of the foot of the pot, or width of the rim, or a bit of fluting in the side walls of the pot... These little touches, the minute attention to detail, are what sets great bonsai apart from the ordinary. Not the "slap in your face" stuff.
Just my opinion, of course.
Happy Easter!