Can't fault the KT, as the one I've used seemed to do well. I didn't care for the trigger at all, but it did work. If you care for a different suggestion -- I like the Kahr CW9 a lot more, and they only run about $29 bucks more.
I don't have the Sig, the main reason is because of the less than stellar reputation it has developed because of reliability issues. I've also read however that some of these issues may have been resolved, but I would not purchase one until it develops a better long-term track record.
If you want another different suggestion, you might look at the Browing Buckmark or the Ruger MKIII or the S&W 22A. All can be easily found for well within your price range, and will in all likelyhood be more reliable than the Sig. I would be that they would be more accurate as well.