I think many things are being overlooked. First off I have none of the systems, but I also am ready to buy one. I am a serious gamer so the Wii is out of the question. What people have not been mentioning are things other than games. Sure I want a great gaming platform, but when dishing out that much money I want more. If you have a psp then the psp to ps3 connectivity is cool and should favor buying a ps3.
In terms of media center capabilities the Xbox 360 seems to be leagues of the PS3, but hopefully some PS3 firmware updates will make it better. What about the future, Xbox 360 is going to have an IPTV based system wher you can use your system as a pvr, with the PS3 you can install Linux and currently do that now. And the hard drive is bigger than the PS3. What is really important to be is HD movie playback from my PC. The only true way to do it streaming is if you use a wireless N connection, but PS3 only supports up to wireless G.
The only reason I'd buy a 360 is for GOW. I think I am just going to wait it out for a bit and see what sony has to offer (I might wait for Metal Gear), but then things were be more fair. Who knows what will happen in the future, with the success of the 360 many developers are jumping to make games for the 360 because it is easier and there are more systems out there right now. Hell GOW broke the top 10 in Japan!!! So predicting the future is just not possible at this time, all you can do is wait. For now I stick to my PC gaming and will get a console that suits my needs in the future.