I doubt it. I don't know what a high end sound bar is but I'd be surprised if it could compete with, let alone beat, what you've already got.
MY THIEL 1.5 FLOOR SPEAKERS
Having our Audio Video system upgraded to surround 5.1 with Sonos backbone to fill the house with sound . The stereo guys want to replace my Thiel's with a high end Sound Bar which kind of scares me . I have a center Thiel SC 5.3 as well and a Klipsch Base ,does replacing these make any sense