I have the Kwak tall screen, great quality and fair price, although got mine free through whinging about amount of faults and recalls my bike suffered and lost work time (self employed) hauling it to and from the stealer (who was an arse and did not care less) - 5 Visits in first month, then about another 4 within first 5k!
Like you I do a fair bit of two-up and prefer Europe to Blighty.
I added:
Heli-Bars, which seem great,
Autocom so she can moan, plus can't live without music on bike anymore
Givi V35's panniers, very neat with SW-Motech quick detach rails - come off in about 5 seconds flat
37L top box which I try to keep very light, normally just maps, spare gloves \ jumper \ visor \ ear plugs and other very light itms, normally less than hald full, but useful for locking stuff in when off-bike.
Was going to add an Ohlins to help out suspension but it mounts on same place as panniers, in negotiations for sale or return deal so I cantry to relocate remote units - Mainly want it for the remote pre-load adjuster.
Plan B is get original shock re-worked by MCT suspension, apparently just gassing them correctly and putting quality oil in can make a big improvement, plus maybe go up a spring rate to give a better balanced comprimise between one up and two up.
You may find them useful - £350 to re-oil, re-spring and gas shock + Re-Oil forks and fit better springs.
Flies Out \ PC3 \ Autocom \ Kwak Tall Screen \ Helibars \ Kawasaki Rack \ Givi Panniers and Top box (Ugh!) - Quick Detach :-) \ Tank Bag with Power - Magic! \ Novus Rider GPS (Camera Warning System)