I'm actually really deep into this kind of stuff too. I started collecting Beatles LPs in the late 90s when I was 9 years old, and it just took off from there. I actually have been putting together a huge playlist of this sorta of stuff, it's almost 6 hours long currently... if you're interested in it, send me a PM and I'll see if I can get it uploaded somewhere.
Here's some selections from it:
This one's well-known, for good reason... required reading.
http://www.youtube.com/watch?v=J74ttSR8lEg
Short, poppy, very poetic words.
http://www.youtube.com/watch?v=gizi54HVde8
Nice harpsichord & wind instruments on this.
http://www.youtube.com/watch?v=lkwBJYZ8n4o
Interesting guitar technique here with the bow, be sure to pay attention to the video. (Audio is from the studio, video is live, so they don't sync perfectly)
http://www.youtube.com/watch?v=mmxMqV00cUE
This one is long and epic... first part is very psych, second part is very classical-sounding.
http://www.youtube.com/watch?v=MHAzNU4Vsus
This literally brought tears to my eyes when I first heard it, superb harmonies, and more of the organ and harpsichord which I am a sucker for.
http://www.youtube.com/watch?v=ZH5Ks4KrzYo
Wanted to just link to the first track of this, but the upload is the full album. Very nice baroque instrumentation.
http://www.youtube.com/watch?v=FeN5eyf7VTI
I think that's enough for now...