About 6 years ago, my first headphone amp and tube experience was a Musical Fidelity X-Can v3 (450 bucks retail) hybrid. When I took it home I noticed microphonics when I tapped it. Returned it to the store and they were happy to exchange for another unit. It still did the same thing. I just kept that unit. But it always bugged me - this is not perfection in my mind.
After a few months I then bought a Lehman Cube solid state amp after auditioning, the bass was so much tighter and extended and the rest of the response sounded more precise at a retail price of $1100 It has to be an upgrade. Solid state is more precise everywhere.
There was no going back...for a few months...after which I started to notice that a lot of instruments are not coming out of the mix like it used to...something was missing and I can't say what. So I unboxed the MFV3 hook it back up and there it was, the dimensionality and image trajection was back. I then noticed the treble sounded much better to me. The bass was not as good nor is it as detailed.
I have since sold the Lehman amp. The V3 is right here by my computer monitor with an upgraded V3 power supply and a few tweaks with different capacitors...it still resonates every time I tap the table.
Your first headphone amp will come with slight OCD - better off with a solid state for beginners then I suppose.
Before Head-Fi I had a Rotel solid state amplifier driving my speakers, now I have a full tube amp driving them. I can live without solid state, but not without tubes - despite that I can clearly hear the measured superiority of a good solid state amp over any tube amp. Some good solid state stuff can take you oh so close to tube sound - but without a tube it will always be trying to sound like a tube, never quite getting there.