GD vs ImageMagick vs Gmagick for jpg?

I am in the step to abandon GD for manipulating image in my website, they just sux .

Everyone saying to use ImageMagick because they are better than GD, but what about ImageMagick vs Gmagick ( Swiss Army knife of image processing )?

Zend has a pretty article here http://devzone.zend.com/article/10531 talking about them.

Before I will leave for ImageMagick are there any motivation to use gmagick instead?

(PHP 5.3+)

Edit: What's wrong with asking which is better between 2 libs? I think it's a fair question. If someone could explain the good-point of one lib over the other would help me and other poeple reading this question. Why close such a question??

Edit2: For everyone asking what I need to do: I think it's oblivious: users uploads images (than can be png/gif/bmp w/e) I need to convert in JPG and then store it in the database, eventually if they are too big i need to resize down them a bit.

Thanks

Source: Tips4all