Pr,
I hope you enjoy your DI's when you get them,I really like mine.
Very good sounding speaker especially for the money.
I haven't heard anything about the Vidar amps,I quess they are finally available to buy.
I do have a Yggdrasil with more than 500 hrs on it and It's a nice dac almost as good overall as my direct stream jr.
Wiil the vidars be safe to use as a bridged mono block into 4 ohms if you choose that configuration.
Best of luck to you,
Kenny.