I used to work at one of the largest Krell dealers in the world. Before I left I did a comparison of a BAT VK 600SE set up correctly to the $40k Krell EVO mono blocks.
Although the Krell had a bigger presentation with bigger bass, the BAT was as good in every way and in some ways superior.
Long story short just because you've had a Krell doesn't mean that another Krell is the right direction.
The newer EVO amps are better but when I heard them I wasn't blown away by the difference.