ANR is the only way to go. You should be able to buy a good second hand DC H10.13X or similar for around $500, so the difference is about $250 more than what you're prepared to pay.
What value do you put on your hearing? If you fly for a living, over 25 years the extra cost is $10 per year. Put a good ANR set on to start with and go without booze/fags/food whatever for a few weeks.