need reasonable preamp w/headphone

Don't know what you mean by "reasonable", but Sonic Frontiers Line 1 (and all Line series pre-amps) has an excellent headphone out, ie they have Headroom circuitry. The Line 1 can be had used for $12-1400. This pre-amp also has excellent full function remote, AND it's a great tube pre-amp too. Cheers. Craig.

The Anthem models made by Sonic Frontiers. The Athem Pre-1L and I assume the Pre-2L that is replacing it does not just have a headphone jack, it has a dedicated headphone amp system build in. Check it out. They are around $400/$800 used/new.

may be an Audible Illusions L1 or a SonicFrontiers line-1?

If you like a preamp that doesnt have a headphone jack there are headphones that come with their owm amp hat can be hooked up to any preamp.

I have an Audible Illusions L1 for sale if interested.