Hi,
None of the old bands, are in one piece at all, anyway ... but for my tastes, I would rather see the whole thing than a partial thing ... but that is a personal favorite ... while GONG was with a different drummer three times, the 3 versions were also different, jazzy with Pip, solid rock bottom with Pierre, and trippy with the youngster from Soul2Soul. Still GONG, but it was not the same ... and it was very good on all three different shows, but it lacked some punch, and I think that it would have been there with Steve Hillage, and that's not to say that Steffi was not a great replacement, but I think that Steve had more freedom to move around than Steffi, which did not make the band as good, or great ... seeing the DVD many years later in the "Unconvention" shows, it was actually more interesting ... though they still lacked the great keyboard work from the original. In these versions I saw, Steffi doubled up on keyboards, but it was not enough, I did not feel ... still great ... but the "depth" (can I say that?) that the keyboards added was missing during this period.
I would rather see Jan with Focus as well as Thijs. But maybe I have heard the albums from the early days so much, that I really was not ready to catch a second hand touch ... but if they came around, I probably would see them!