thanks for the help guys.
booked on DL in the end. $1000 each dec 12-25. booked through UR portal so spent 66,700 UR points. i think that is pretty good for non-stop at this time of year with exactly 2 weeks advanced purchase.
have to pay DL about $90 for the infant. can i use a gift card for that? (thinking i will buy it from a grocery store for 6% back on my AMEX)
anyway to upgrade to DL comfort+ with skymiles? they want $110 each way