Subdoofus:
To answer your question, if the DVD player's volume control sounds good to you and gives adequate gain, I would question buying a pre. If, however, such is not the case, or you need to switch other sources, then a pre would be in order.
The used CJ is a good recommendation and I would add the Bottlehead Foreplay if you're interested in tubes. If your preference is solid state, then a used Sonographe SC26 or Adcom 750 (a bit of a budget stretch) would do nicely.
To answer your question, if the DVD player's volume control sounds good to you and gives adequate gain, I would question buying a pre. If, however, such is not the case, or you need to switch other sources, then a pre would be in order.
The used CJ is a good recommendation and I would add the Bottlehead Foreplay if you're interested in tubes. If your preference is solid state, then a used Sonographe SC26 or Adcom 750 (a bit of a budget stretch) would do nicely.