I like ALL of them in my possession, But this S110V fitted with Lynch Clip and Ripps Garage Tech micarta scales , Gets the most use. Honorable mention M4 Carbon Fiber KW exclusive!
My favorite is the Jade/satin M4, my best version is the CF/M4, my S110V Blurple is no slouch either. I just got the K390 version so maybe it will become my favorite.
In reality the S30V version is very good and is no slouch itself. If you want something better than the standard S30V, the S35VN version is very good too. There are a lot of different models out there on the secondary market and they can be hard to find and will cost more money. You could get the S30V version and see how you like it then go from there.
How's the corrosion resistance on the M4? It looks like a good steel on paper.