Only thing is 4000 are so old you have to source from eBay and they’re pricey. When I think back of tires I’ve taken to the tip with loads of life left. Regretting it now.Conti GP4000s on the front of a couple of bikes as that's all the forks will allow (25mm on the rears) and Vittoria Rubinos all round on another (which will just do 25s) as they were the cheapest at the time.
Edit - the bikes with the GP4000 will take 25mm of other makes, but I prefer the Contis.
conti 4 seasons and conti gator skin