The Voyager/Peachtree modules designed by EAS are the latest thing from them. The reason they do not measure as well as Purifi and Orchard is that they chose to use very little feedback (20 db....decided by listening tests....something Kuibo does not understand). Purifi and Orchard use a ton of feedback.
As far as switching frequency.....this is arguable....at best.
Please, do not listen to me or anyone else.....listen to the amps and decide for yourself which one is for you. All of them have rave reviews.....If you want to decide beforehand based on measurements....then fine......but don't think your super fine measureing amp is the best sonically. I modded the Purifi based VTV amp so check out 10audio.com and read his reivews of the NAD using this same module versus my modded VTV......he gave the NAD a 6 and my amp a 9.5 bordering on 10 (10 point scale)......this is for sound, of course.....he did not measure them. Every single thing you do to an amp changes the sound. I can improve the Orchard, as well.....very easily....and yet, it will not measure one iota different. This game is infinite......just like our infinite nature.....enjoy the infinity.....and beyond!