But if so, which one? Do I buy a CD/download? Or online? Which ones work for the "partnership" and which for us personally? How do I choose? When can I buy it?
Buy TurboTax Business (for your LLC - Form 1065) and TurboTax Premier (unless you need to do Schedule C in which case you would buy TurboTax Home & Business).
Buy the download versions of both products; do not buy the online versions (there is no online version of TurboTax Business, anyway).
TurboTax Business can be used to prepare the income tax return for your LLC (Form 1065) and associated K-1s. TurboTax Premier (or Home & Business) can be used to prepare your personal income tax return (Form 1040) and will accommodate entry of the K-1s from your LLC.
You can buy both download versions probably late next month (November).
If you are still in doubt, Intuit offers a 60-day money back guarantee.