Never heard a PA7 but knew the PA5... I’d sell the Nak as they still bring in decent cash and spend a little more and look at Pass X250. In my system my X250 disappears or actually my speakers do. I do use a tube preamp but I’d say my preamp is more on the neutral side than tubey or soft, but that being said my system is smooth, but not slow, bass authority but the Pass doesn’t throw the bottom end in your face but it can slam when needed.
I’ve listened to many McCormacks over the years and the past and current Parasounds and they all are very good and I’d pick those over the Nak but no way would I trade any of these for a Pass... even an older X250. Everyone’s taste and system is different but don’t overlook a Pass. The X250 is probably close to your budget but they don’t show up too often but maybe Reno HiFi has one. Yeah it’s a little old, but built like a tank to last.
I’ve listened to many McCormacks over the years and the past and current Parasounds and they all are very good and I’d pick those over the Nak but no way would I trade any of these for a Pass... even an older X250. Everyone’s taste and system is different but don’t overlook a Pass. The X250 is probably close to your budget but they don’t show up too often but maybe Reno HiFi has one. Yeah it’s a little old, but built like a tank to last.