I have a feeling you might like those GE 6V6s. If not, then I would *probably* be willing to take them off your hands --Ha!
You know, I have limited experience with the JAN Philips 6V6s longbowbbs recommends. I do recall them quite sounding good, as have the Sylvania JAN 6V6's I've heard. The NOS 6V6 tubes I have the most listening time on are the GE, RCA and Tung Sol brands.
Look on the bright side: If you don't feel the GE's or the Philips add significant additional qualities to your sound reproduction over the particular J.J.'s you have, then consider yourself lucky. You could be finished with the rigmarole of tube rolling, and instead simply enjoy exploring more music!