Can you use overlapping iTunes and iCloud accounts?

Apple IDs are fun, yes? 😉

The situation:

• I'm slowly upgrading two (2) Macbook Pros with Mountain Lion, and I've run into the problem of two members of the same household tied to the same Apple ID for iTunes purchases.
• I've read all the tech support articles and tutorials for saving the iTunes Apple ID and then adding two (2) more Apple IDs for iOS and Mac OS X iCloud services.
• I'm wondering if I can avoid juggling three (3) different Apple IDs by having some overlap.

Here's the current setup:

• Spouse
  • iPhone 4S / iOS 6
    • iTunes tied to Apple ID #1
    • iMessage using phone #
    • No iCloud setup
  • Macbook Pro 13" / Lion
    • iTunes tied to Apple ID #1
    • No Messages setup
    • No iCloud setup
• Me
  • iPhone 5 / iOS 6
    • iTunes tied to Apple ID #1
    • iMessage using phone #
    • No iCloud setup
  • Macbook Pro 15" / Mountain Lion
    • iTunes tied to Apple ID #1
    • No Messages setup
    • No iCloud setup

My question is -- since Apple ID #1 is technically my email address, can I use it for both the shared iTunes purchases and my iCloud account?

The revised setup would be:

• Spouse
  • iPhone 4S / iOS 6
    • iTunes tied to Apple ID #1
    • iMessage using Apple ID #2
    • iCloud using Apple ID #2
  • Macbook Pro 13" / Lion
    • iTunes tied to Apple ID #1
    • Messages using Apple ID #2
    • iCloud using Apple ID #2
• Me

  iPhone 5 / iOS 6

  • iTunes tied to Apple ID #1
  • iMessage using Apple ID #1
  • iCloud using Apple ID #1

If it's easier just to create Apple ID #2 and Apple ID #3 for iCloud and messaging stuff, let me know. I'd prefer to keep it simple, though.

Thanks,

IronChefMoto