In reply to M0GIA:
I have never used the T1 but I have used LDG Z100 on the summits and now use it for portable back at base operations in combination with the IC-706 MkIIg and a Watson power mite PSU. I was very sceptical when I bought the Z100 but I am now very impressed the same goes for the Power Mite. On the summits I use a linked dipole and no tuner. Everyone I know that has the T1 raves about them so they must be good but I think the Z100 is considerably cheaper.
You say “the use of an ATU is almost unavoidable for the amount of bands I wish to cover” and that is true if you wish to work the whole of each band, but for SOTA you can pick a section of the band and have the antenna resonant on the exact frequency you want to work. The number of bands you want just increases the number of links.
Regards Steve GW7AAV