I forgot to say. I haven't heard the "classic". Had a look at the specs on cj's website to find out it has 6C4 M8080 tubes in it. Which is most probably from the Mullard bunch CJ bought and is probably the sole supplier. They used that tube in the PV-14 and PV-15. That tube has a warm signature. I had the PV14 as my first pre. A very nice sounding unit. Reliable and simple. Just not the same level as a 10 or 14 though. So if the classic ressembles more of a PV 14 (same mrsp), you will IMHO be better with a 10 or 14 in good working condition.
Regards !
Regards !