Bought Imagine on Q8 the day before I bought my Akai CR80-DSS. Green tapered cartridge. Had it first on 2ch LP as a new release. Rebought it as a UK SQ when I went to preamp/amp, MC cart, etc. Bought UK CD, DVD-V of Gimme Some Truth (making of doc in 5.1), another green Q8 from a collection I inherited, BR of Gimme doc, and super-uber-duber Imagine box.
I've never been wild about the SQ/Q8 Imagine Quad mix. It's a 6 at best, mix wise, 9 or 10 musically. It is one of my most played Quads, mostly because of the music. I greatly prefer the mix on Gimme doc DVD-V & BD or in the 5.1 uber.
I don't recall any EMI Quads that were available as US SQ, or any other Quad formats, other than Q8's. Those Special Markets titles are all I recall of US EMI SQ's. Many Angel classical US titles were SQ, however.
Although from Radio Shack, "The Full Spectrum of Quadraphonic Sound" and "Bach To Bernstein" are Columbia (CBS) Special Products SQ titles and compilations culled from Columbia Quads. I have both of those. Again, among my least played Quads. Not because I'm disinterested, but because I have most of the tracks on the artists' own Quads.
Both Chase Quads are among my most played. I've owned 2ch LP's, Q8, SQ, CD and Quad SACD's of these. Ted Piercefield, one of the trumpets, is an old customer of mine. Peterik was a client and friend of a guy I worked with. Met him, talented and great guy.
I like Bernstein's Mass. I listened/saw it on WTTW/PBS long before I bought the Quad. I bought a 3 Q8 set in a slipcase, like Chicago double Q8's. CBS sent me an LP size booklet after I remitted the post card. I rebought it on CD and would gladly rebuy it in Quad SACD. All that being said, it is also one of my least played Quads (and CD's.) I need to be in the mood for it. Although, it got many more plays than all the aforementioned Special Markets/Products Quads.