Best Value Line Stage Tube Preamps?


Given they are all multi-input, multi-output, balanced line stage tube preamps, what are sonic benefits of a serious Rogue RP-7 or Prima Luna EVO 400 vs. the $899 Schiit Freya Plus? Currently these would feed a Parasound Halo A21 into Legacy Signature SEs, with all cables and speaker placement constant. I know the relevant mfrs/dealers all offer trial and/or return policies, but living far from any source and disliking return hassles, I'm soliciting expert opinions before (preferably, in lieu of) undertaking in-home experiments.
I know that much depends on one's own listening habits and sonic signature preferences, but surely differences in power supply, output impedances, etc. might be objective benefits to spending the 5x more coin for a bigger, badder device?
hickamore
I, too, listen to Eva Cassidy via a new Audible Illusions line stage and it sounds GREAT. AI is an old line preamp, still made in Fla. They make as they sell ‘em. But a # are available used. When I first installed my first one used, some 15 years ago, I was blown away with the sound. I recently upgraded to a new one, it’s great‼️
@rongold...do you have the new L3B?  Art is a good friend of mine.  I heard the new line stage and it is indeed wonderful.  I like the new faceplate and the rounded buttons.  Nice updated look.
"The best value in line stage tube preamps is a tie between Raven and Prima Luna. Both come with their own dedicated power amp included at no extra charge."

No Millercarbon. The Pima Luna Evo 400 is strictly a preamp and does not include a power amp stage. 
The Pima Luna Evo 400 is strictly a preamp and does not include a power amp stage.

Primaluna has a number of integrateds if that's the route someone wanted to take.

No Millercarbon. The Pima Luna Evo 400 is strictly a preamp and does not include a power amp stage.

Actually the new PrimaLuna line has all the gear named EVO XXX. There is an EVO 400, Amp, Preamp and Int. Amp. Kinda confusing.

https://www.primaluna-usa.com/integrated-amplifiers
https://www.primaluna-usa.com/preamplifiers
https://www.primaluna-usa.com/power-amplifiers

Even the DAC is an EVO 100.