I don't generally "believe" in putting cameras or lenses into check-in luggage (although I have put a backup lens in there once or twice). All those go in my carry-on luggage, along with the laptop, hard drives and medicines.
For me the check-in luggage is for clothes, tripods, ballhead, chargers, cables, extra batteries, flash brackets, camera bags, etc.
Yes, camera bags. Usually now I use a regular roller bag for my carry-on, and put my camera bag (stuffed with chargers/ballhead/etc) inside my check-in duffle.
So I'm not sure what else the extra 7kg of check-in allowance would do for me, other than peace of mind in not having to worry how close to the 23kg limit I was at each check-in.
You're not also taking some "domestic" flights on a second airline that you have to worry about are you?