Recommended photo preamp with Klipsch and 300b amp?

Pretty much nailed the choices in that price range; I would add the Hagerman Trumpet to the list.

You have pretty high sensitivity speakers so need to watch the noise floor...

Are you using lomc or mm?

Some others to consider (all would have to be used with your budget):

Manley Chinook - to my ears, this has the sound signature you're looking for.

Pass Labs XP-15 - a little more on the "neutral" side, a bit more detail and dynamics and a ton of gain and loading settings

If you prefer to buy new, consider the Musical Surroundings Nova iii.  I have not heard this unit, but previously owned the Nova Phonomena, which was a very neutral and flexible phono stage.  Not quite as much detail and dynamics as the other two I mentioned, but might be a good match with the Klipsch.

At the 2k limit there's the Gold Note PH-10

What cartridge? MM or MC?

BillWojo