I have fitted the Givi Trekker aluminium panniers to mine http://www.givi.it/Bauletti/Monokey/TRK46N-TREKKER and on a recent long trip round Sardenia they proved excellent!! I have also now bought the internal bags they sell so that when you wanna carry your stuff from the bike to the B and B room, you just carry the bags and leave the panniers locked to the bike. BUT they are not cheap, I paid about 200 Euro per case!!! They can be top opened OR you can open the whole side, as you like, and they can be fitted as side panniers OR as a top box. Quality seems excellent.

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(Now sold on, sob) 2011 Blue XT660X with gold wheels, was 26,500 km.
Engine mods: K&N Stage 1 filter, DNA Stage 2 filter, snorkel removed, Kev fuel mod fitted.
Plus: smoked Puig screen, Yam aluminium sump guard, Yamaha / Acerbis handguards, Givi Trekker aluminium side cases, Leo Vince X3 cans plus Kev front fork mod and Fender Xtender. Just fitted Michelin Road Pilot 3 tyres.

SOLD the XTX for a Super Ten 1200. And just bought a Raptor 700 so staying on here for some tips....