I can only speak about NAD amps. The original 3020 was a ground breaker in it's day. No longer available except in the used market. If you can find one in good or refurbished shape then...good for you. The NAD 326BEE is an excellent amp. Don't know what the newer model 326 V2 sounds like.
Most important...............
Whatever amp you decide on make sure whatever you choose there is an opportunity to audition it with the speakers you plan to use. My NAD amp sounded horrible with top of the line Klipsch speakers but sounds great with PSB speakers. Amp/speaker synergy is paramount.
I have a NAD 375BEE integrated amp. 150W that can handle almost any speaker load. Lists for around $1500 new but can be found used for a bit less. Don't be fooled by watts/channel. The NAD amps are high current and can handle heavy loads. Just my opinion.
Most important...............
Whatever amp you decide on make sure whatever you choose there is an opportunity to audition it with the speakers you plan to use. My NAD amp sounded horrible with top of the line Klipsch speakers but sounds great with PSB speakers. Amp/speaker synergy is paramount.
I have a NAD 375BEE integrated amp. 150W that can handle almost any speaker load. Lists for around $1500 new but can be found used for a bit less. Don't be fooled by watts/channel. The NAD amps are high current and can handle heavy loads. Just my opinion.