I had thought about miles but Delta wants 120K (in Y) - so not even 2+ cpm. I may just bite the bullet and book now and hope for a re-fare sometime in the next couple of months. Unfortunately with our vacation schedules we really can only leave and return on a weekend so we may be forced to pay more for that.
Here's some food for thought: many FTers have gotten Chase BA cards and will be unable to use their miles efficiently, so methinks they will have an artificially low value on the Coupon Connection soon (maybe 1.2 cpm). You shouldn't limit your options to DL (I agree that DL miles are increasingly hard to use; thinking of signing up for an Amex in order to burn the rest of my stash at 1 cpm).