PS3 firmware 2.3 is scheduled to come out next week, which adds DTS-HD output. That’s pretty damn significant, because you couldn’t visit an AV message board without seeing folks bemoan its (previous) absence. It was the last “piece of the puzzle,” to use a crutch.
With DTS-HD, the PS3 is not only a complete, as far as I know, Blu-ray player, but it’s 100 percent future-proof. If you’re in the market for a Blu-ray player, you’d probably be best off going with the PS3.