It just comes down to whatever you prefer man.
If you're into the band then you could easily turn the Tumblr into a nice band blog but I love the Twitter for personal use.
It's whatever you want more really dude.
Personally I would say no. 2006 are extremely rare I sell tenure accounts and sold a 2007 for $30 once so a 2006 tenure is worth at least $50 and with an OG name on it can hit $100's