The real answer is to try all of them and buy the one you shoot the best. All are good quality and reliable (well, I'm not sure about the Walther. They're not very popular). You don't say where you live so it may also be possible to easily try and buy an HK, Springfield XD, FN FNP, CZ75 or others also. If I didn't live in MA or another AWB state, I'd have an HK P30L without a doubt.
Personally, Glocks don't point naturally for me though I'd probably get used to it. Also, I don't have any problem with the slide release using thumbs forward on either my 226 Elite or regular 229. To the contrary, I find the slide release quite well placed. This goes along with trying them yourself instead of taking advice on the internet.
Personally, Glocks don't point naturally for me though I'd probably get used to it. Also, I don't have any problem with the slide release using thumbs forward on either my 226 Elite or regular 229. To the contrary, I find the slide release quite well placed. This goes along with trying them yourself instead of taking advice on the internet.