Can someone suggest a lush tube integrated under $3000 used

If it has not already become apparent, you will be best served by not giving any additional credence to those persons whose only apparent reason for frequenting this forum is to obsessively advertise brands that they own.

MC, is your Blackhawk "lush and syrupy'? If so, sorry for  you. If not, nice try and thanks for playing........

Fortunately Raven Audio has a very generous 45 day home trial period.

 With shipping both ways and restock fee that could get kind of pricey. But it's the only way to know for sure.

Oz

Agreed about the Avatar SE in triode, not so much ultralinear. You should probably look for a tube amp that can play both triode and UL. The CAV can be wired to do triode but it's a project, no a switch, although you can probably make a switch. 
 

OP: Raven Audio Nighthawk is a great match with high sensitivity speakers. I can tell you from experience (I owned the Blackhawk for several months) that they don't do as well with anything less than 88 db. I tried them with Harbeth 30.1 and SHL5+, and while they don't sound bad per se, the limitations of 20 watts become immediately obvious. They were ok in my home office (12x13) but were completely lost in the main audio room (20x15). I'm willing to admit that in my case it was not the amp's fault, I just wasn't matching them with appropriate speakers.

All I'm saying is that they don't do well with low'ish sensitivity speakers in slightly bigger spaces. Don't let anyone persuade you otherwise. But if your speakers are reasonably efficient in a small to midsize room, then yes they are absolutely amazing. I also owned Cronus Magnum II prior to the Blackhawk, and while the CM provided more oomph, it lacked the beautiful and lush (not syrupy at all) musicality of the Blackhawk. Given your speakers are a good match, Raven provides a nice dose of the 'true' tube sound without stepping into the 'syrupy' territory. The build quality and looks are also top grade.