The log cabin blanket

Today I am finishing the last log cabin square with the currently available wool. There will be enough squares for a small blanket and, if I want it to be any bigger, I will need to go out and buy some more wool. That would rather defeat the objective of "stash- busting". There are now decisons to be made. Do I simply sew up the squares as they stand and make the blanket? Do I make a contrasting border around all the squares to make the blanket slightly larger? If I do make a border then what colour? Do I knit the border or crochet? Decisions, decisions. The other option, of course, is to go out and buy more balls of wool and make more squares - the decision of the procrastinator.