Recommendations for a high-interest savings account?

Hello, I am wondering whether anyone could recommend a good high-interest savings account in Belgium. I am about to sell a property and once the mortgage is paid off, I plan to keep the remainder (perhaps 25 thousand euros)in a high-interest account and hopefully get a monthly or annual income from it. I will of course be asking my bank and looking around, but I thought I would see if anyone has had a good experience in this area.
Many thanks.