My recommendation is to purchase the EF-1. You may experience 'tube rush' in the EV-1. Phono stages are very sensative in this regard. Although the EV-1 is a fine unit, it is not a Premier 15. The EF-1 is left 'on' to keep the circuits hot and at 100% efficiency. The EV is a tube unit which will need to go through a warm up period. Either way you go you can't really loose with C-J equipment. Also, I think the EF-1 has more internal adjustment capability for gain and loading. I own a EF-1 and am very pleased with its performance.
Regards,
Regards,