Focal Chorus 807V
The Chorus 807V has a 7-inch Polyglass mid-bass driver and a 1-inch Magnesium/Aluminum inverted dome tweeter.
I demod these myself and was absolutely blown away by their low and midrange output. This is an all around great speaker. Not sure what your budget is but these have an MSRP of $1100. If my budget was smaller, I would've done a 5.1 of these instead of the PSB Synch 1's synch system I built. This 807V Bookshelf smokes the tower version. If you get them at a decent streetprice, I think they'd be the best $700 you could ever spend on a pair of bookshelves with thick lows, and mids in mind.
Timbre matching what you have now I think would be pretty impossible without opting to go with the same thing that you are reportedly not that crazy about. Maybe get one pair for now and look to replace the ones you aren't entirely happy with at some point.
I'm not a professional but I know what I like when I hear it, and I really liked these.