I think about any band I like and I immediately identify with the voice(s) of the band, the vocals. Sure the lead, rhythm, bass guitars and drums and keyboards and tambourines etc, the jams, the hard rocking, the exploration, spacey, psychadelic, all that of course plays into the overall band make up but to ME the voice is how I identify with the band. For me to get that Dead feeling I really like hearing that familiar voice. Jerry where are you?? But the "other" voice of Dead music is Mr Bob Weir. It sounds goofy and everything but I immediately feel comfortable when I hear Bob's voice, even if it a mere shadow of the great voice back in the day, I love hearing it. Ok so with Furthur JK fills the Jerry void for me well almost, kind of but hey I get my other voice - Bobby's. Through the Dead's line ups (I'm talking 2003, 2004, 2009) I learned to accept Warren's voice as filling a void, not really Jerry's but at least a void. So when he plays with PLF, I feel comforted and that I am in the Dead zone. It's fine to explore new avenues especially since we don't have much choice. I enjoy the revolving Phil line ups but I haven't really lost my mind over any of them. Except for when Warren is there. Nothing against Jackie at all I like him alot but hearing him squeak out Estimated Prophet doesn't do it for me. I'm almost thinking Bob's voice is more irreplacable than Jerry's in this grand Dead world.
It's funny because from 1965 - 1995 no one was looking for different interpretations of the Grateful Dead music, I mean hell no such thing even existed, other than JGB or Bobby and the Midnights or something, Kingfish. I still gravitate more towards to the familiar than to the let's explore in some weird way. Sorry that's just what gets me off. That will all change when Bob and Phil hang em up, but I can wait. It's ok to want to hear that original sound, I wish people would at least acknowledge that instead of jumping all over them for not jumping for joy over Stanley Jordan for example. To each their own, that's what we have to remember.
So to answer your question, I would take Furthur ANY day of the week. I like what Terrapin said that Furthur is my wife and PLF my lover. That being said I am very excited for Bob solo. That familiar voice, and I don't care that he botches lyrics or strummed the wrong key, I just love hearing that man sing.
Tryin' to find a breath of air
I went walkin' on the mountain
A friend had told me I'd find you there