can you send a picture of the quilt and your border selections? Do you have any extra blocks you incorporate into the border? I have a couple of books on borders that give great suggestions.
One that I have done that really looks good and not like you only wanted to enlarge it.
use on two fabrics for three borders. The widest border goes in the middle (size can equal the other two borders, but I would not make it larger) The same fabric on either side of the center fabric. Example borders 1 & 2 say CUT 4 1/2 inches = 8" borders, and center border 7" wide (cut 7 1/2).