I have the Krell Phantom double chassis preamp and it is amazing.

According to my friend at Krell there is no real difference between the 202 and the Phantom except for a couple of small changes in the power supply. There is little or no difference in sound according to him. The new Illusion is the same except for the cosmetics.

Very reassuring thread - thanks
I bought my Krell Evo 202 many years ago and never felt the the need to change even though all the rest of the kit has been - but I have wondered. I'll stick with it