I also have just created a GTD template using Ultra Recall. This is another program that has piqued my interest as being a nice solution to follow the GTD principles.
Ecco Pro is superb. I have not found another program that allows me to outline my tasks, while viewing their attributes in columns - which I can edit without opening each task item. In my view, this outline/detailed columns feature is crucial to how I view project planning and management - and seems crucial for GTD implementation.
Today, I am not willing to rely on Ecco Pro to keep up with Redmond's endless SP's, etc. My company is Outlook based.
However, I am impressed with Ultra Recall. It does not, however, offer much for Project/Task management that I can discern. Your template for GTD would be a welcome addition. How can we try it?