advice on integrated amp

A used YBA Integre. 50 glorious high current watts. I don't think you can do better for the price. Beautifully built and sweet sounding. Can do battle with amps for twice the price...and win. You understand, that your post is going to generate posts for just about every used amp on the market that falls into your price range. You don't hear YBA mentioned enough. Don't know why. I own this amp and will be upgrading to the new YBA Passion Integre soon. It is a very hard integrated to get used, because you don't see many for sale. You will in a few months, though.

Meadowlarks sound good with just about any high quality amp.
In your price range check out the Rega Mira (new ~ $900), or Creek 5350SE (used ~ $1000).

I know Meadowlark very well and used to be a dyed-in-the-wool integrated person. You have some good options above. The better the integrated the more the Meadowlarks will open up, so go the extra few dollars if you need to and can. Almost any of the British amps will do well and the Naim may mate better with the Ketrel HR. The Electo amp would probably sound very neutral and give you tight bass. Also consider a used Conrad Johnson integrated and the Carins. The CJ will be exceptional with the speaker in the midrange and sound stage. The Carins will open up the top and be real sweet. Good luck.