Nice lookin bike EZ300. Bet you can carry a heap of gear in those cases.
Ive used the KTM and TT tank bags. Both about the same $$$, both have rain covers which work really well but the TT has a neat zipper around the base that lets you remove the bag in 5 seconds without having to put the 3 straps back on. This is about the only + between the two IMO.