The print in the border is very busy so any quilting you do won't show very much at all on the front. It will show on the back. I would keep it very simple for that reason (why put a ton of effort hand quilting on something that won't show unless you are only a few inches away?)
I would do a very simple cable like this:
http://quiltingstencils.com/cableborder35.aspx
These are both cute and would probably go fairly quickly
http://quiltingstencils.com/heartinheartborder3.aspx
http://quiltingstencils.com/heartborder3.aspx
Go through the border designs from Stencil company. You should find plenty of ideas but i would keep it a very simple motif.