Bookshelf/Small Speakers

Don’t overlook the Aerial 5T. It is similar in design to the Salk that Hilde recommended. 
These are great sounding bookshelf’s but are power hungry. If you’re going to use your Carver you should be in good shape. Not sure what your tube amp may be, but you can bi-amp the 5T too. 
I have mine hooked up to a MA 7900 (ss 200 wpc) and they sound fantastic for a little speaker. A little light in the bass but that’s the reality of a small driver.
While the speakers are well made, the stock jumpers really hold them back. I replaced them with some WW Oasis bi-wires ($90) and could hear an immediate improvement. Money well spent. 
Here’s a little rah-rah infomercial:
https://www.bing.com/videos/search?view=detail&mid=D5210292D83AF9C0A8DCD5210292D83AF9C0A8DC&...

Good luck with your move to downsize. The upside to downsize is there’s freedom in simplicity. 

Hello pikes.  Be sure to check out the Golden Ear BRX, and the similar sized speakers from Legacy and Ocean Wave..

Harbeth p3esr comes to mind, so do the Spendor A1's, or if on the cheap, the wharfedale diamond 225’s or the dentons.....

Any LS3/5A type speaker including Harbeth, Spendor, Falcon, Stirling, etc., should fit the bill. I have owned many of that type of speaker and the Harbeth is my keeper. There are many positive reviews and this guy is right on describing the P3!
https://www.youtube.com/watch?v=mqFIaiPT_kY

+ many on budget parameters being helpful.
That said, Fritzspeakers and Selah both make lovely smaller boxes, maybe in the 2k range.
I own neither, btw, but would happily, if I had an application.