ICloud for a family of 4

Question

We are trying to come up with a hassle-free sync solution for 4 iOS5 devices in the family (4 iOS5, apple TV, 2 PCs, 1 Mac).  Please comment if you think it can be done better.
1. Mail, calendar, contacts, and notes: We are not using iCloud here
Since 2.5 years we have been using a shared family email account with calendar, addressbook, notes.  Works like a charm -- as soon as one device adds/updates a contact -- all others have the latest.  Calendar entries show on all devices instantly so that family engagements are never double booked and grocery list (and other notes) are instantly updated across the devices.  Hassle free, hands free, as it should be.  Any employers email accounts (email, calendar, contacts, notes) are setup the way employers' systems dictate.  Any additional personal emails are also setup the same way - no cloud needed there as things are already backed up at source.
2. Music, Apps, Photos, Documents: Using iCloud here - Our questions are here
We need to share these among 4 iOS5 devices + PCs + Apple TV.  Considering the following arrangement:
1. Use single existing Apple ID that runs iTunes on the PCs - populate that in iTunes and AppStore on all 4 iOS5 and apple TV.
2. Set up only one 5GB free account and enter that information into all 4 iOS5 devices + PCs.  The devices and computers will hopefully share the photos and documents.  We miss out on the free 5GB on 3 devices, but things work seamlessly.  Since email etc. is out of the way -- 5 GB may just be enough for a Photos and documents.
Questions are:
What will this mean for iMessage? for facetime? Impact on any other features of iPhone 4S?
Is any better arrangement possible?
3. Bookmarks and reminders: We dont really have a need to share these across the 4 iOS 5 devices.

Answer 1

Hello Tejwanir,
I don't if this is a better/worse setup. In my family we are also 4, and are using a lot of iOS 5 devices, Macs and one Apple TV. Everything works fine, also with iCloud.
Everybody has got a free @me adress you can get easily now with iOS 5. Everybody in the family is using his own @me account to:
log in his own iCloud to manage Contacts, Calendars, Reminders, Bookmarks, Notes, Photostream, Documents, Find my iPhone, Backup and Mail if needed.
setup Facetime on every device
setup iMessage on every device
create maybe a Game Center account
Then we have an Apple ID or iTunes Account which everybody uses to:
log in to Settings>Store on an iOS device, to purchases content
setup Home Sharing
log in to iTunes Store on a computer
maybe use iTunes match