RE: The timing of replacing speakers

The original Oxford on my 74 twin crapped out on me. Thinking about replacing only the damaged speaker for now, but I'm wondering if there is any significant reason why I should replace both speakers at the same time? Are there advantages to buying two ET65's at once, for example? Will I receive a "matched pair" or something? What about buying one used and buying one new? 

Naw ... go ahead and just replace the one ... you might just LOVE the combination!