I installed Windows7/64 on a newly assembled computer for a friend
with a 64 GB ssd (Crucial C300) and a 1 TB Samsung hdd, so I know
about what I speak.
I installed the OS and some apps for him and he has installed the rest
of the programs, p.e. MS Professional suite 2003. I advised him to put
only OS and programs and Documents on the ssd and the rest on the
Samsung.
Then after a week I saw him again and saw that the ssd only had a
little bit more than 5 GB of free space! That took me by surprise and
I advised him to only place the most frequently used programs on the
ssd. Which he will do.
After all, I should have chosen a bigger ssd for his computer...
I myself use a 90 GB Vertex2 on one of my computers with WindowsXP SP3
and that is enough.
You must realize that Windows7/64 uses quite a lot of space for itself
and I would give you the same advice as I gave to my friend: only the
OS and the most frequently used programs on the ssd and even the
documents on the other hdd to spare space but that is up to you
because if like me you use many documents frequently it is a great
pleasure to see your doc's opened instantly.
Massimo