What are the "Must have" LP's?


I have recently re-discovered the LP. I listen to Jazz, blues, classical, and some rock. I was curious as to what my fellow audiophiles here on audiogon believe to be the albums that you simply MUST HAVE. As a sub-question, What LP's do you use to show off your system? Since I am just getting started, I have no real opinions yet, but as I become more and more familiar I will post my findings. Thanks.
limabean683
Rives, i would have also recommended the 45rpm Sheharazade but it is over $150.....if you can find a copy. in fact, by far my favorite records and the most sonically spectacular, are the 45rpm Classic Records reissues.

i have 3 test pressings of the new 45rpm series by Analog Productions and they are equally as good;

Ben Webster, Live at the Rennesiance
Bill Evans, Waltz For Debbie
Count Basie, 88 Basie Street

Lima, if you can afford any of the 45's by all means do it!
One of my all time favourites is Talk Talk, "The Colour of Spring. Pick up a copy of this second hand and see if you enjoy the music. Seasons' best
In addition to the wonderful suggestions above:

Hank Mobley "Soul Station"
Lee Morgan "Candy"
Louis Smith "Smithville"
Sonny Rollins Blue Note 1542
Mobley Blue Note 1560
Fred Jackson "Hootin' and Tootin'"
Clifford Brown Memorial Blue Note 1526
Kenny Burrell Blue Note 1543
Any Ben Webster
Any Don Lanphere on Hep Records

Just a few, time is short, Happy Holidays!
Black Uhuru - The Dub Factor

One can never tell if you will like the music, but this WILL show off a systems capabilities, more vigorously than any other that I am aware of. A must have for me.
If I may, I'll add a few of my favorites:

180g Reissue from Acoustic Sounds:
Sonny Rollins - Saxophone Colossus
Bill Evans Trio - Sunday at the Village Vangard
Creedence Clearwater Revival - Any of the reissues

Reference Recordings (45 rpm) Out of print, but available used
Mickey Hart, Airto, Flora Purim, et al - Dafos
Respegi/Pacific Symphony - Church Windows

Mobile Fidelity
Grateful Dead - American Beauty

Sheffield Labs
Stravinsky/LSO - Firebird

Classic Records (RCA reissue)
Mussorgsky/Reiner/CSO - Pictures at an Exhibition

United Artists
Nitty Gritty Dirt Band - Dirt Silver and Gold (3 LP set, out of print, but I just picked up a very nice used one here on the 'Gon) Well worth tracking this down.

Dire Straits - Love Over Gold

Mark Knofler(sp?) - Soundtrack from Local Hero

Pete Townshend/Ronnie Lane - Rough Mix

Tangerine Dream - Rubycon