After looking at the two guns, and reviews from others that own them, I went with the Benjamin Cayden. over all I think that it will fit my needs. I was looking at the neutron star, and almost bought it, but the hit or miss machining, and owners negative reports, of problems I declined. There is also the warranty difference.. 1yr hatsan 5 yr benji.. The Kratos seems to be well built, and owners are reporting good results in both .22 & .25. So, I started looking at other guns and I must say , it wasn't easy ! I really had to keep on track with the budget, and not get carried away . In the end, I choose the Cayden because , of the performance , appearance , threaded barrel, foster fitting fill source, location of manometer gauge , barrel band, and the 5 year warranty. Thanks to all ,for your help and input .