In my humble opinion the only accessories needed on a standard 06 Tiger are a Scottoiler and the additional relays to allow both headlights on together. The rest is personal and just icing on the cake.
For what it's worth, my additions beyond that are Triumph top box with backrest, Touratech cross-bar and lockable GPS mount, Garmin GPS, Autocom, Triumph race can and tune.
I'm over 6 foot, overweight, and done lots of miles, but never really had any unbearable problems with the standard seat or screen. I recommend you get off the bike every 200miles, and don't do over 85mph for prolonged periods
[ This message was edited by: chrisn on 2005-09-29 02:35 ]