Thanks everyone. I checked all of these out and will provide some feedback.
First, let me make it clear that I have next to zero interest in orchestral libraries. I'm mostly looking for traditional / eastern / abstract instruments and anything that isn't "bread and butter" or whatever, so keep that in mind. Keepforest - everything is "epic" and/or "cinematic". Hard pass. Sound Yeti - one of the worst professional websites I've ever seen. No idea if they even have an overview of their Kontakt libraries anywhere or how to get there, but none of the products I've come across are interesting to me anyway. Zero-G / Ethera: don't need choirs, don't need any orchestral/cinematic stuff. Some of their eastern/world stuff seems interesting, so I might have a look next BF or something. Indiginus: seems like good stuff, but they don't do sales apart from intro prices it seems like. I wouldn't go as far as to say their products are "always on sale" because they're not exactly bargains. I'm particularly interested in the Mandolin and Banjo, but I can get those for less and possibly in higher quality from OTS during the group sales. Sampletekk: got the Rain Piano. I'm too well covered in every other area they're covering, but their libraries certainly seem like bargain bin gems at those 90% off prices. Fluffy Audio: I will listen to Drummer Boy and pass. Sonuscore: I've had Symphony Series Percussion in my sights for a while. It's Kontakt Player though. Also, I got Evolution World Percussion and UVI World Suite so not sure I need it anymore. Everything else is a little too orchestral for me. Osterhouse: seems like good stuff, but almost exclusively orchestral. Might grab the upright bass on sale. 8dio: well aware of them. Too much stuff to choose from. Not a fan of the Soundpaint stuff and I'm guessing 8dio stuff is of similar quality. Might grab some ridiculously cheap stuff during flash sales or BF anyway. Orange Tree Samples: mostly Kontakt Player, so I own a handful of guitar and bass libraries already. Obviously amazing stuff. Will grab more during the next group buy. Looking at the baritone guitar, banjo and mandolin. Skybox Audio: don't need any more keys instruments, but I might look at the prepared pianos during the next sale. Sound Dust: seems wild. Love it. Will probably raid their site during the next sale. NI / Komplete: don't know, I'm just not interested. Lots of stuff seems high quality, but also not the highest quality out there and everything is quite ordinary. Komplete is great when you need to cover the basics, but I've got those well covered already. SoundIron: yup, well aware. Will go wild during the next sale. My wallet is already weeping. Xperimenta Project: f- yeah. Great stuff. Got the Fisarmonica and Indian Organs and will most likely grab the Preparato and Classica Double Bass (for the upright). Soniccouture: I love and own Sun Drums, although it pales next to BFD. Used to own Grand Marimba and deeply regret selling it because it has to be one of the most beautiful sounding libraries ever. Still own Broken Wurli and Hammersmith and have no use for them, but nobody seems interested in buying them. Embertone: great stuff. Will pick up everything that isn't "cinematic" during the next sale. Cinematique: absolutely hated the KLANG stuff and how wet it all is. Not looking any further. Production Voices: seems like keys only. Not interested. Waverunner: seems great and cheap, but they have nothing I'm not more than well covered in already. Heavyocity: I did grab all of the Foundations stuff, but none of their paid libraries are speaking to me. Westwood: didn't like the free Felt, don't care for anything else. Sonixinema: heavy focus on cinematic libraries, but I will probably grab Abstract and Bowed Metals. Possibly Resonate, but I do own Spitfire Resonate already.
Now for stuff I discovered, mostly by looking at current sales or freebies: Strix Instruments: had the Pripyat pianos already, got Emisynth. Pretty good. Impact Soundworks: I think they're quite well respected on VI-Control. The free Heritage Percussion is decent. I might pick up a couple of their world instruments on BF. Paper Stone Instruments: picked up Creative Junk and German Log Drum. Great and extremely unique stuff. Unearthed Samples: dirt cheap and very creative. Picked up Bowed Fences, Sawmonium and Tension Drums.
Looks like the next MacBook will have to be the 4 TB version.