By oure chance I ended up watching 4hrs of documentaries about snipers just before that fight so I was clearly an expert. Fav boss of all time and you're given the chance to skip it if you know what you're doing.
Ground zeroes does have the Kojima rescue mission, so its a viable argument.
(I really like MGS but having only ever owned a PSP and a PS4, I've only had the chance to properly play Peace Walker and GZ, MGS and MGS2 were played through with chums during uni and 3 and 4 passed me by)
Really looking forward to Phantom Pain though!
"Let me tell you, when yung Rouj had his Senna and Mansell Scalextric, Frank was the goddamn Professor X of F1."
You should absolutely get your hands on 3 - it's available in basically everything. I have a soft spot for the 3DS one but would probably recommend the vita or HD collections.