Beautiful quilt! You did a great job. As for borders, I agree with what everyone else says. It's a matter of preference. I use borders when I am a little small on size and am trying to get to a certain size. Otherwise, no borders for me.
As for scraps, you could post an ISO bulletin here. I've been the person in line with 30 bolts of fabric getting 1/4 yd of each when I want variety. I don't have much stash. You can buy fat quarters or charms, I often do when I see them on sale. But a 1/4 yd or 1/2 yd is the most cost effective.