$5000 or under speaker secommendations?


I'm thinking about getting a second, used pair of either bookshelf or full range/floorstanding speakers for my system (currently I have the Avalon Radiants and love them).

Not wanting to spend my child's college tuition on this second pair, I want the best money can get for a pair that would typically list around $3,500-5,000 new. I'm considering the Martin-Logan Aerons or Ascents, Opera Callas, Thiel CS 3.5, and Sonus Faber Electa models, but am wide open to other recommendations.

Anyone care to share their opinions, preferences, favorite picks?

Thanks!
output555
just want to put in a good word for Harbeth monitors (the M40 and Super HL5 are actually bigger than your average monitors). they are laid back, smooth, natural, and detailed. not terribly efficient though.
Von Schweikert's have several great speakers in this price range VR4 latest generation (used, new may have went up recently)
Martin Logan are very good, I use them exclusively in the HT system but they do need very musical gear to sound pleasant, otherwise they are VEEERY revealing ... beware here! ... however you can never forget their sound if you like it.
I would recommend B&W 703, 804, 805, or 803S speakers. I have 703s and couldn't be happier, until I get to upgrade to 803D or 802D speakers down the road at some point. Best advice is to go take a listen somewhere, it convinced me pretty quick... :)