I find Rubber Soul pretty revolutionary as well, but SPLHCB is probably the album that personally brings me the fondest memories of the era, and i still love to listen to it, while the songs on Dark Side of the Moon just get me depressed reminding me about how another 10 years have slipped away...(but i still really dig the songs and the group! particularly UmmaGumma!!)
Musically, i tend to prefer Zep and Pink Floyd over the Beatles but not everyone out there liked these groups folks, everybody liked/likes the Beatles...
just for the record my choice of the best album ever is Blind Faith
Just wanted to bring up "Disraeli Gears"...another great one.