I have the ST1050 SW Motech Alu-rack fitted to the Tiger 1050 grab rail, haven't got round to buying the Triumph panniers yet though but they do fit. That set up gives more pillion room with a top box fitted if you fit the SW Motech Tiger rack fitted the box overlaps the seat!!!
Do a search on
www.tiger1050.com theres a few pics there of the set up, theres a guy in your area called Multilife that has the same set up as me & the Triumph panniers fitted.
Ps blue is the best colour!!