I have been using Spendor for over 40 years and currently have 6 pairs. Over that time I have had A LOT of amps on them and from my experence they do 2 things: 1 they sound good with about anything and 2 the better the amp the better they sound. Since they are an easy load for an amp just about anything will work. I would go with the Krell 300s, the current model that retails for $2500 but can be bought for under $2000. You should hear them with my CJ 350, which is admitidly overkill.