Inexpensive, neutral-to-warm sounding SS headphone amp?


Looking to get a headphone amp solely for evening listening after wife has gone to bed. 

Using modest (Grado SR225 phones). Although I've read these are considered bright
I've never experienced them as such but then, I'm particularly sensitive to fatguing highs
so I don't own any bright-sounding components.  

My DAC is Aqua La Voce S2. 

Budget: $200 new or used.  Two possibilities, so far;

Schiit Magni 
Geshelli Labs Archel2.5 Pro  

Any other suggestions? 
stuartk
Yes, indeed-- the Aqua DAC is on the warm side but my headphones are not...

I will probably try the Jotunheim first, see how I like it.

I'm very sensitive to highs, hence my (perhaps) over-concern with straying into fatiguing territory. . . 
I bought Jotunheim and am very pleased with the results. It seems to be an excellent pairing with the Aqua DAC-- very agile and detailed enough to suit me while still maintaining musicality. I will upgrade my headphones next year.  
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