Do you think your trunk rack would fit with Givi saddlebag racks? I'm thinking they want to mount on the same bolts so they will be incompatible.
If one wants a trunk and saddlebags, the choices for saddlebags are OEM or Givi. If you go Givi, I'm not sure what trunk rack you can fit other than the Givi. OEM saddlebags don't interfere with any known trunk system.
I like your trunk position enough that I will probably duplicate your setup with a SHAD 58X on the back. IF I get an H2 SX. I'm still thinking about a late model FJR1300ES (I currently ride a 2005). Doesn't have the pop, but it does have large well-shaped saddlebags and can take any trunk. Also another 170W or so from the stator (I run amber police quality flashers and am trying to run a "mobile" ham radio when helping at bicycle charity events). And the FJR has a much bigger aftermarket. I'm not as good a rider as either bike. The FJR is the "responsible" choice. But it doesn't tickle my fancy as much as the H2. And I can afford the difference.
The lack of factory support for a trunk and the relatively small funky saddlebags indicate to me that they wanted to make a daily-driver version of the H2, not a real touring bike. I'm not sure how much more it would have cost Kawasaki to create the H2 SX as a serious touring bike.