LARGE Phalenopsis - Repot or not??

[suneday]

I have a phalenopsis with 12-inch leaves -- it bloomed from Feb 15 - early June, with a huge spray of large white flowers. When the blossoms finally withered, I cut the stem to just above the second node. It has new leaf growth and seems very happy. It's in a 7-inch, shallow pot,
which it came from the florist in.

I am thinking of repotting it into an 8.5-inch clay pot, which is about 8-inches deep (tapered). Is this a good idea? The plant is top-heavy, and I now have the smaller plastic pot inside this large one.

Thanks!!
Carol