Best Preamp = No Preamp?

Most SS sources (excluding tube ones) have an output stages that can equal and sometimes better many preamp output stages, especially tube ones.
So the myth that a preamp can drive the interconnects to the amp better is a "furphy", and started by preamp manufactures, and "Ohms Law" will prove that time and time again.
The only time you may like a preamp in the way is if you prefer it's colouration it gives, at a cost of transparency.

Just remember the Nelson Pass quote:
"We’ve got lots of gain in our electronics. More gain than some of us need or want. At least 10 db more.
Think of it this way: If you are running your volume control down around 9 o’clock, you are actually throwing away signal level so that a subsequent gain stage can make it back up.
Routinely DIYers opt to make themselves a “passive preamp” - just an input selector and a volume control.
What could be better? Hardly any noise or distortion added by these simple passive parts. No feedback, no worrying about what type of capacitors – just musical perfection.
And yet there are guys out there who don’t care for the result. “It sucks the life out of the music”, is a commonly heard refrain (really - I’m being serious here!). Maybe they are reacting psychologically to the need to turn the volume control up compared to an active preamp."

Cheers George

As the original OP's question asks. "Best Preamp = No Preamp?
"I'm thinking that I can connect these DACs directly to my Power Amp skipping preamp"

Like I said, and I'll say it again. Most SS sources in direct connection to the amp/s these days will drive the interconnects and amp/s as good if not better than some active preamps, especially tube preamps.
As todays SS sources have buffers with output impedances low enough and enough voltage output to drive any interconnect and amp. It's OHMS LAW.
And then yes, "the best preamp is no preamp".

And not only do you get rid of the colourations of preamp in the signal path, but also an extra set of interconnects.

Cheers George

I'll say it again,
Most solid state sources these days have very low impedance output stage buffers that can drive anything, and are as good if not better than many preamps and without the colouration, especially tube preamp.
A preamp that can drive 32ohms, that does not make it a necessity to have in the signal path, keep it as a headphone amp. As most solid state sources will drive anything they see today.

Cheers George