Do I go from a Primaluna HP Integrated to Schiit Freya+ and a pair of Aegir Amps?

Schiit Freya preamps are fun (!) and recently improved (I have the original version and it's great sounding) so that's likely a real good idea, and you need only one Aegir to get cookin' (I use a 12wpc single ended tube amp with Heresy IIIs...killer sound, plenty of headroom...2 REL subs are also in the pile). The good news with efficient speakers is the ability to use any amp with 'em, although lower powered Class A or single ended tube amps are addicting and keep you in the efficient speaker domain.

Thanks Wolf, I am still on the fence and for Tuberis, the room is small 12X13 and not a lot I can do with it. I have heard 3 dimensional, speaker disappearing sound out of a 40+ year old Marantz 2238B and an almost as old pair of Paradigm "Export Monitors" from the early 80's and that is what I seek!

I bought all this equipment long ago when I had hair!

Schiit gear is good but having owned both brands, Primaluna is far and away better. The parts quality, the build quality, the sound quality, the longevity...all better than Schiit. Every piece of Schiit I had was nice at first but slowly degraded over time and had issues. First crackling, then intermittent failures needing a restart, then inputs on the DAC would stop working and Schiit customer service would just shrug. Primaluna has been solid for years. Zero issues. Sound quality compared to a Luxman $9k integrated was almost indiscernible in comparison. 

Schiit just couldnt hold up so I don’t trust them as a brand or a company. 

To you question of tube pre and class A solid state preamp, I say yes very good combination. One of the best combos I had was the AES (Cary Audio) AE3 DJH tube preamp with a Pass Labs Aleph 30 class A power amp. I still have fond memories of that system with plenty of power driving 87db speakers in a medium size room.
The Schiit system your interested in looks promising for a very reasonable price. I've had good luck w/ excellent sound from a Schiit phono preamp and have their DAC coming shortly. Yes to Schiit for bang for the buck.

a single aeiger would be plenty with your khorns but youd be limited to unblanaced inputs