EAT 300B Tubes

My Western Electric 300B tubes are more than somewhat long in the tooth - about 10 years old but with fairly light use. They are the original tubes in my Cary 300SE Signature mono blocks (I think the second series Signatures with the gold face).I was going to simply replace them with a new pair as I have always been happy with them and then I did a bit of reading.....

Has anyone had any experience using the EAT 300B's with these amps?

Would appreciate anyone's input on this specific pairing.

Many thanks.