depends on your priorities,but in IMHO after having the jc1s for 1 1/2 years seems to me its greatest asset lies in its overall balance of strengths.other amps may do specifics SLIGHTLY better;
(krells dig deeper,halcros are more transparent and extented on top,pass's xa series are sweeter and warmer)but neither comes close to the jc1s natural,smooth and neutral mids while at the same time offering excellent build,parts selection,power,bass slam and definition,speed,detail,lushness AND good looks.
in the end,can't think of a better option for two 400 watt monoblocks at the price.