We toured with 2 Squire Urban Paramount D Locks new design which weighs in at 1.7kg now.
1 for each of the bikes, which allowed us to lock front wheel to rear & frame and rear & frame to front when the bikes were side by side, so you had to get through 2 bike locks to get the bikes. In theory each lock is meant to stand up to 5 mins of attack but the best option appears to be to leave your bike where someone's elses is less well locked and more 'interesting' to the resale market. Tourers I don't think rate that highly on resale - especially steel ones that are bright yellow... If we needed to leave them they were either in a building out of sight, (worked well for us) or covered with our tarp, so none of the reflective patches (tyres and spoke reflectors) drew attention to them, but the truth was if we were not happy with leaving them, they were not left and we would move on.
Both the Abus Granit X Plus & the Squire Urban Paramount D Lock are Sold Secure Gold and and on the security rating, both are 15 out of 15, and both seem to weigh around the same mark, so I guess either one would do. What you do for the 2nd lock is another matter when there is only 1 of you (there may not be, but nothing in your post gives any indication of another tourer).