Passing array parameters to a stored procedure

I've got a process that grabs a bunch of records (thousands) and operates on them. When I'm done, I need to mark a large number of them as processed. I can indicate this with a big list of IDs. I'm pulling the IDs down along with "payload" data via another stored proc. I don't need to update all that data, though -- just update a flag on certain records. I'm trying to avoid the "updates in a loop" pattern, so I'd like to find a more efficient way to send this bag of IDs into a SQL Server 2008 stored proc. Proposal #1 - Table Valued Parameters. I can define a table type w/ just an ID field and send in a table full of IDs to update. Proposal #2 - XML parameter (varchar) with OPENXML in proc body. Proposal #3 - List parsing. I'd rather avoid this, if possible, as it seems unwieldy and error prone. Any preference among these, or any ideas I've missed?