Get the first or third set that you linked to. That curved adjuster is a bit of a kludge. I have it on my 9 speed bike for my front derailler. I originally installed it to control the rear derailler but found that the adjustment steps were too large to get a perfect adjustment. The front derailler seems to tolerate it ok. On my 10 speed bike, it came with regular barrel adjusters for both sides so it seems that Shimano got the hint. FYI, those Sora stops are barrel adjusters. They are plastic hence the cheaper price but they work fine.