LCP sux, Shield is good gun, Kahr is good gun. Depends on what you like and look for. I like trigger consistency, same pull all the way through. This is why LCP sux to me. Just like it's big bro the LC9 it has the spongiest awkward and inconsistent trigger I've ever had the displeasure of using. I owned both of the Elsie bros, for reference.
Dry fired the Kahr several different times at shop and liked it a lot, other than being way too long for me. S&W triggers are usually mediocre and their products even bottom end are of high quality.