Sorry to bump but it seems like I answered my Own question
I bought SH3 and was....underwhelmed. The Camera system grated on me quite a bit. (what? No camera switch to nearby targets?) and crashed to desktop quite a bit randomly. I think I am going to Steer Clear of SH5, i've heard it's quite buggy and is 'trapped' behind U-softs Uplay-wall which is all kinds of awful. SH4 is quite entertaining in its own right however. Guess Ill keep on keeping on