Phono stage for second system

Check out Sutherland!

https://sutherlandengineering.com/

Another vote for Sutherland. If you're using a low output moving coil cartridge, the TZ Vibe is excellent and a small form factor. I'm using it with a Hana ML moving coil cartridge.

https://sutherlandengineering.com/tz-vibe/

"open to tubes as long as the unit is one box solution."

Good:

https://www.usaudiomart.com/details/650160664-manley-chinook-phono-pre-amp/

"Better"

https://www.usaudiomart.com/details/650160529-primaluna-evo-100-tube-phono-preamp/

Both have been demoed in my setup.

Currently using PL which at the price, is easily comparable in sound/build of $4K+ units. Since SQ is personal, build quality unquestionably will be on par-likely better than any $4K+ unit.

Both have a standard footprint, but worthy of consideration based on listed price.

Within your budget I went with a small Luxman 10wpc integrated tube amp with built in Phono, both MM and MC, with remote volume. Sounds terrific.

Luxman SQ-N150

Stereophile Review

I wanted tube sound, but minimum heat in a small room, so went low power, and decently efficient speaker, restored AR-2ax 3 way with 10" woofer and level controls for the tweeter and mid.

I switch headshells, use both MM and MC cartridge, but you are limited to a MC cartridge that works with the Luxman’s specs, 100ohm load is ideal for my mc: 0.3mv; 10 ohm coil

PHONO (MM): 3.0mV/47kΩ
PHONO (MC): 0.33mV/100Ω
LINE: 180mV/47kΩ

I actually got enough volume out of that amp using less efficient Wharfedale 225’s, but they sounded small without a sub