Help select a Programming language - MP3 Tag Editor

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C++

MFC

Python

media

MP3

Hello everyone,

For quite sometime, I have had this thought of investing time to develop a MP3 Tag editor. I have a gigantic mp3 collection, and most of it is not tagged properly. I am trying to re-tag my database and do a lot of repetitive steps.
Here is what I have in mind:

1. Software loads up my library. On the left side, it shows a tree view of the different folders.
2. When you click on a folder, it will display the mp3s and album art on the right side.
3. There will also be a small panel at the bottom which will display whether the folder has been properly tagged or not (based on a set of rules).
4. Software allows me to re-tag individual mp3s or bulk at a time (Similar to how Tag&Rename does)

Questions:

1. What programming language would you think would be most suitable for such a project?

I am not really concerned about efficiency, as it could be a slow program which I can leave it running and get back to it when it is done. The primary consideration is the ease of developing a GUI. I am familiar with C++, and Python, but haven't worked with GUI components in a long while . Should I deal with the headache that's MFC or does Python offer easily programmable Tree View interfaces? Any other programming languages that is worth thinking about?

Thank you.

(sorry if it turned out to be too long)