SkyDrive (with included 25GB free storage)
25GB - free
45GB total - $11 per year
75GB total - $27 per year
125GB total - $54 per year
Seems like a steal to me. They already give 25GB free which is well above most services, and:
Dropbox is:
5GB - Free
50GB total - $9.99 per MONTH (thats $119.88 per year for 50GB total)
100GB total - $19.99 per MONTH ($239.88 per year for 100GB total)
SugarSync is:
30GB - $4.99 / month or $49.99 / year
60 GB $9.99 / month or $99.99 / year
100 GB $14.99 / month or $149.99 / year
250 GB $24.99 / month or $249.99 / year