Your NOLAs are a very efficient rating of 90db. Simply piling on a larger wpc amp is a waste …big time.
It seems that they favour British amps synergy wise. The Brit offerings in your price range are mostly s/s and not tubes. A close s/s proxy to a tube amp in your price range is the SUGDEN A21 Signature that runs in pure Class A that would be a fine contender and no pretender.
https://www.sugdenaudio.com/a21-integrated---line-amplifier
It seems that they favour British amps synergy wise. The Brit offerings in your price range are mostly s/s and not tubes. A close s/s proxy to a tube amp in your price range is the SUGDEN A21 Signature that runs in pure Class A that would be a fine contender and no pretender.
https://www.sugdenaudio.com/a21-integrated---line-amplifier