My two cents = The last amp, is the Goldmund, try the Mimesis 18 monoblocks. If the Goldmunds float your boat except for the price, try the plain vanilla version of the Goldmund line = Job or aka stellavox lines. Pair of 200 wpc into 8 ohms with a stunning slew rate for about $2000 per pair of monoblocks. Last if the Goldmunds are too spendy and the Job/Stellavox just too visually challenged, consider the Plinius SA-102 on the secondary market. Plinius product will easily put the Classe to shame, trick will be getting a monoblock pair under $5000 but it can be done with patience. Best wishes on your quest. Any/All of the above will exceed your 20 year timeframe.