Being the plane geek I am, I'd go with the 727. They won't be around for that much longer and they are a great aircraft to fly by all accounts. 737's will be 10 a penny for years to come. If the 727 offers more money and a better lifestyle too, I'd definitely go with that as that counts for an awful lot. 727 or 737 experience are both good to have in the book for when you want to move on in the future.
If you go with the 737, let that 727 operator know I'll come and fly for them !!. I've got an ICAO CPL/IR.
