Iíve never replaced an awning or looked to getting a different awing or experienced with any different brands, so I canít help you much.
But A&E has a lot of different models and types of awnings. You may want to check out the A&E Domentic
web site to see what they have. If your Sunline is older, you may find that Dometic has made many improvements to their awnings from what you currently have / had.
seem popular, but I have not experience with them.
Hereís another link that may be helpful in researching different types of awnings:
Sorry I wasnít more help.