off the top of my head i'd either pick Sunny Day Real Estate's "Diary" or John Coltrane's "A Love Supreme". though, if i put more thought into it, i'd most likely pick something else.

cool, I'll have to check those out.

I'd have to say Eno's "Here Come The Warm Jets" is a good choice, also "Before and After Science" - then there's "Remain In Light" by Talking Heads. "Overnite Sensation" "We're Only In It For The Money" or "Hot Rats" by Zappa and the Mothers. Going down a different track I'd say "15 Wild Decembers" by Geoff Smith was also a good one to nominate. But surely a "Perfect Album" would vary from individual to individual. Those choices I have given directly reflect my musical tastes and as everyone has different subjective musical preferences surely there can be no one perfect album for all, just a perfect album for each of us? (and I aknowledge that Plastics perfect album is given the qualifier "according to plastic" I'm just thinking aloud forgive me for rambling)
Information is not knowledge
Knowledge is not wisdom
Wisdom is not truth
Truth is not beauty
Beauty is not love
love is not music
MUSIC IS THE BEST
(Frank Zappa - from "Packard Goose" on the album Joe's Garage)