Everybody says those, the 1970 acoustic studio records. They are great, but I also like, as whole albums:
The Grateful Dead (1967)
The most accessible version of the original Pigpen-fronted band. Not quite as explosive as some '66 shows, but it’s pretty tough, and “Viola Lee” is allowed to stretch.
Ace (1972)
This was credited just to Bob Weir, and they’re all his tunes, but the whole band plays on it, and almost all the songs became live standards. It’s a Grateful Dead album. The brisk jangling innocence of “Cassidy” here doesn’t bear much relation to the way the song would take flight in concert, but it’s awfully pretty.
From the Mars Hotel (1974)
“Unbroken Chain” is the one Dead song for which the studio version really is better than any of the live ones.
Blues for Allah (1975)
The record where they really left Pigpen’s band behind (two years after his death, and much longer since he’d been the performing center). Totally original, and fairly difficult for many listeners, but one of the finer-polished jewels in the studio legacy.
Terrapin Station (1977)
The orchestra parts and production sheen were derided among some live aficionados, but I like it. I wish they’d gotten around to finishing the music for all the rest of Hunter’s “Terrapin” suite lyrics that don’t appear here.
And I like scattered cuts from all the others.
Still, the studio work is such a small part of the Dead’s output and legacy, there’s no way I’d be as devoted as I am if that’s all there was. Hell, there were a couple hundred songs in the performing repertoire over the years that were never recorded in the studio at all!
I don’t have XM myself, but I’ve heard the Dead channel there, and you’re right, it’s not the best presentation of the live material.
What are a couple of your most favorite studio cuts? Maybe there’s a good-quality whole-concert recording particularly featuring those songs which would appeal to you.