Upgrade from my internal Primaluna phono stage... Audio Alchemy PPA-1? What else?

So I am currently using the built in phono stage in my Primaluna Dialogue Premium Integrated (along with an Audio Interface CTS-80 SUT). The other gear is a VPI Classic 2 w/ 3D arm, Dynavector DV20X w/ Soundsmith Ruby retip, Devore Gibbon Super 8s. Musical taste is all over the place but is generally 60's to 80's underground rock, soul/funk, jazz, reggae. Not really any Classical or much modern stuff.

The Primaluna phono stage is better than I thought it might be but not sure just how good as I haven't heard this amp with anything else. Can't really tell how far I need to go to get a noticeable improvement. Can't really spend more than $1k if that (really should be less), but am happy to buy used gear.

Anyone else have the Primaluna phono board and upgraded? How much better can I do for under $1k?
Been scanning the ads here and the other usual places and doing plenty of research but I just keep going in circles. Too many options and no clear winner. Hopefully you guys can help narrow things down with experience with some of the same particular gear I am using.

I like tubes but don't feel it is 100% necessary as I have tubes in the rest of the path. I like the idea of MC capable especially with loading options but I have a quality SUT so it is also not necessary. A small chassis is nice as space is limited but a full size component is ok if it isn't too tall. No space for some big Audio Research type piece of gear. I am in NYC and in a 100 year old house with some wacky wiring so a good power supply and noise rejection is a plus, too.

I am Intrigued by the Audio Alchemy PPA-1 since Audio Advisor has them on sale for $799 ($1795 MSRP) but there is surprisingly little info on them out there beyond a positive Michael Fremer review and some other passing mentions which are also all positive. Seems odd for something that appears to have been out for a couple years now. Anyone actually have one or at least heard it? What else should I be looking at?