Airbus must be offering knock down prices if what were reading here is to be believed. The only sensible replacement for a 737 would be another 737, it does the job and it does it well. As others have mentioned though i guess if you dip your toe in the A320 market and order to many you have to put them somewhere, not saying it is a bad aircraft, but unless price is involved why swop to A320's from a 737 fleet.