While you won't find these in any store, I would suggest auditioning a pair of Tyler Acoustics Linbrook Signature (Is) in an owner's home. Used they go for about 3.5-4.5K/pr. and should meet your needs and preferences nicely. Superb bass extension that is as clean as it gets, with natural sounding highs that don't miss the detail either, and mids that are pure heaven. The Linbrooks have a slight warm character that only adds to their musical enjoyment, IMO. Great build quality too, BTW.
Another possibility used (albeit a stretch financially) are the Von Schweikert DB99s. These go for 12K/pr new, but only a year ago they were selling for 10K/pr., so a used price of 5K is not *entirely* out of the question (even though it would be tough to find them for that price)... I found these to be about equal in overall sound to the Tylers, and you should be able to find a pair in stores to audition. *Very* nice sound, and while you really don't need their 99db efficiency at all with your amps, you will be able to play these *extremely* loud, low and clean. The DB99s and up are where I feel the VS line really begins to distinguish itself.
---Dave