Tull without Martin Barre

This is exactly what I meant. At this moment in time, Jethro Tull is mainly a project of Ian Anderson, not a band as it used to be, and he'll take any musician available when he decides to tour (you can read this on the J-Tull website), since they have not recorded in over a decade. Granted, is his brand name so he can do whatever he wants, and indeed he always chooses very good musicians, but Martin Barre is simply irreplaceable. Ian  can bring great guitarists who emulate Martin's sound and do a decent job at it ( just like Benoit David is doing with Yes, replacing Jon Anderson), but no matter how good they are, they are not Martin Barre, who has a very orchestral approach to his playing, and creates a very unique and personal sound to Jethro Tull's music. 

Agreed!!! Too bad Ian Anderson doesn't see it that way and prefers touring, and destroying whatever is left of his vocal chords in the process, than recording an album, so I guess any further guitarist he brings, will only emulate Martin's playing, instead of bringing his input on any new material.

Definitely. Saw Ian with these guys as his back up band and the Tull material was very good. I'm a huge Tull fan and a huge Martin Barre fan, but the reality is that Tull has always been Ian Anderson and other musicians. As huge a part Martin has been to the band, it's all about Ian-he'll do what ever he decides he wants to do. 

That said it would be neat to see a Tull with Anderson on flute and some vocals, Martin on guitar and an additional singer to help out since Ian's voice is about shot.