I am using 50GB of a 135GB C: W7 64 Home partition.
Almost all of my installed applications and data are on G: (internal) partition.
Hibernation Off, Pagefile elsewhere.
Restore points kept to 1-2GB.
Recycle bin emptied all the time.
20+ GB was the clean C: install (bloatware removed)
My feeling is 60GB is too small. But SSD prices are expensive.
Pay extra or wait months/year.