preamp/amp or integrated? That is the question

I listen to: big Symphonies, electric blues, classic rock.

And what speakers do you listen to the above through?
Without knowing what speakers you intend on driving, I'm afraid any recommendation about amps is meaningless.

Speakers: right now upgrading from my current EPI 400 to
ADS 910.

Rock-

what other gear will be included in your system? Most importantly, which brand(s) of cables & power cords do you plan to use as well?

I would be interested in hearing from the guys who own a Pass Labs integrated? Keep me posted & Happy Listening!

So many good choices at your price point. If you go classic/vintage make sure to have a thorough inspection/refurb. Those speakers are too good for 40 year old caps. Might want to have the crossover checked too.

Either these days can deliver top notch sound. The devil is in the details. There is less for the end user to get wrong that can negatively affect resulting sound and performance with a good integrated amp. They are also more compact and ergonomic. Separates give you more control but involves more smart decision making to get right.

Either can sound really good and offer good value. I use both to good effect and would have few reservations going either way these days.