Which would you do?

Which do you think is more beneficial for seo?

1.Money site<---15 web 2.0 properties<----Social bookmarks

Or

2. Money site<---15 web 2.0 properties<-----500k+ sb links (edu./pr0-6)

what about

15 web 2.0 properties<----Social bookmarks
. .
. .
. .
v v

money site <----- 15 web 2.0 properties<-----500k+ sb links (edu./pr0-6)

Money site<---15 web 2.0 properties<----Social bookmarks
This is good because you can easily done.

I'll mix both ways

i'd mix but if i had to pick one I'd go with the sb links over the social bookmarks - however if the topic / market was "time sensitive" I'd go with the social bookmarks.

I do social bookmarks. 500 cost $5 on fiverr. So far so good with them.