Top5, Ferrer, Del-Potro, Berdych. I see this happening in the end.
That would be my guess too.
Almagro, Melzer, Wawrinka, Dolgopolov, Raonic, Gasquet etc. all feels too inconsistent to crack the year-end top8.
The others possibly yes, although Raonic is a wildcard, nobody really knows how high he can do. Imagine what his serve will do in Cinci or Paris. He also looked totally nerveless in Aus, and a slam-class mentality is a huge, huge plus. The US Open could be great for him.
Melzer is 8 atm, despite 3 months of constant injuries. If he can do it now, he can do it for the end of the season.