I'm going with the option that includes a pick and/or young player with expiring filler. The Odom and Marion trades do nothing for our future prospects. Either would likely walk at the end of the year, just as would Artest if he remained on the roster, since we're not in a position to be giving a massive extension to a 30-ish player. Getting Thomas off the books a year earlier is nice for the Maloofs pocketbook, but we're looking at more flexibility the summer his deal expires anyway.
What either the Odom or Marion trades do immediately are to address the Artest headcase problem, and probably make us temporarily better for one year. Neither is a horrible situation, but at the end of the day what are we left with other than probably a worse draft position and possibly delaying finding out what Jason Thompson can do. Either could be mid-year trade fodder, but once again we'd be hoping to get back some long term piece (pick or young player), so we come back to the option I chose.