There's a local radio show every week that plays Dead tunes (lots of hippies where I live I guess), when I was younger I just didn't get it. I can listen to them now and it's alright stuff, doesn't really pump my nads, but the bass player definitely has a pretty unique sound going on.
Dangit, are you in Dallas? I get seduced by half a Grateful Dead song on KNON just about every Friday night. Then the vocals start up, and I can't do it anymore.
I'm definitely a Deadhead. I think Phil's tone from the mid-70s is one of the all-time great bass tones.
I'm not a Deadhead by any means, but that tone, and really the tone of the band is something to think about. I just have a really low threshold for harmonized vocals.

