Either a Rema Tip Top kit, or the Michelin Kit is my recommendation. I have personally "Race" tested both to speeds in excess of 260kph for sustained periods (8-16 laps of Phillip Island) as well as literally thousands and thousands of road kilometres on both without any issues. Must be lucky hey!
Unless the tyre's construction is compromised, then I never even bother replacing the tyre. I just use them till the tyre wears out. I also changed once again literally thousands of tyres while working in a bike shop. Of which, many had plugs inserted early in their life and were still holding pressure when the tyre eventually wore out and was replaced.
If common sense is used, they are as safe as houses.