Rushton,
I also own the first Doors LP and Strange Days from the 45 RPM series, and I think they both make significant improvements over the originals. My impression of Morrison Hotel is that it may be the best of the lot (thus far) - it really parses the frequency extremes nicely, opens up the soundscape to let the recording breathe dynamically, and removes a lot of grunge I felt always vexed this particular recording. While I never owned any exotic pressings of Morrison Hotel, this 45 absolutely eviscerates the copy I do own. Just my 2 cents.
Tonight: LA Woman