everettT: Thank you for the reply, but respectfully, I disagree. Snell KII speakers are available used and in good condition for well under $500.00. I have personally seen several pair. I also purchased a pair of Snell KII speakers that had been reformed several years ago and I believe I paid about $150.00 + shipping. A good pair today should be in the $300.00 - $350.00 range. Although I realize that most modern (new(er)) speakers will contain some electronic components MIC, I think you may have missed my statement that I am looking for used speakers, which would minimize any MIC components. Obviously, the older the speaker, the less likely they will contain MIC parts.
I'm really leaning heavily towards the Snells. Although I am intrigued with the Zu Audio Omen bookshelf and the Ascend Acoustics Sierra 2 speakers, though they are over budget.
Like I said, my buddy is not an audiophile, but in reality I am sure he'd be happy with a set of newer Klipsch Reference bookshelves.
I've had several long conversations with him about the benefits of excellent speaker offerings made in the USA, Denmark, etc., and explained the meaning of such terms as sound stage, imaging, sensitivity, etc., and he seems interested in obtaining such esoteric goals for his system - as much as his budget will allow with the existing equipment he has. It's not that he doesn't have the money for a top-shelf system, it's just that such a system is not a priority for him since he's not an audiophile. I think a quality speaker is an important part of reaching, at least, some of those goals.
Thanks again and I will continue the research.