Networking, syncing, online storage set up

I want to keep the following computers in sync -

15" MBP - my main/work computer - running OSX and Win7

Mac Pro - the home computer for downloading, work, pleasure use, running OSX only.

MBA - Running OSX and Vista

I have a 1 TB Time Capsule to fit into the set up. I also want to use an online storage service for easy anywhere access to files.

Software I'm considering:
SugarSync
Drop Box
Chronosync?

Any other suggestions? MobileMe not an option since I have windows involved, right?

Networking is confusing. Any tips, software suggestions greatly appreciated.

Thanks.

 

Anyone use DropBox or Sugarsync?