The Duos are better than anything I've heard except the Trios. They make virtually everything else sound like hi-fi. Buy a pair, get the amplification right (single ended triodes) and forget about upgrading speakers or amps (unless you're upgrading to the Trios) forever.
Avantgarde Speakers
I would like to hear fellow member's comments on Avantgarde speakers. It sounds like they have a very accurate sound plus great dynamic range. Unfortunately, the Avantgarde home page does not have much information on the speaker's frequency response. The over all ranges are given, but, no measure of flatness is listed. Also, it looks like they are priced on the high side which may be partly due to the company trying to recuperate R&D costs. Any comments would be appreciated. ThanksX10**6!