To start with the PS3 has a 11% failure rate where upon the XBOX 360 54% Failure rate. this is a REAL FACT!! Carried out by independent sources, and Microsoft at the time of these findings didn't dispute them.
I am an owner of an Xbox360 and recently brought a 250 GB PS Slim and this is my opinion.
To start with those coming from the XBOX environment will find the online stuff very different.
Where you would have a lobby style menu system on the XBOX from the point of turning on your console, you don't get that on the PS3, but what you do get makes up for that.
Here is a list of the good points.
1)For starters Playstation Network is Free, no more paying £35 a year for the privilege to just play online.
2)The PSN Store is easy to shop from, and they have a good catalogue of Arcade titles as well as full games like Wipeout HD and Warhawk.
3)If you thought the XBOX Premium themes where good, just wait to you see the dynamic themes for the XMB.
4) if you thought that the PS3 graphics are the same as the XBOX then you are right and wrong.
Games released on both platforms are pretty much identical. But the PS3 exclusive titles realy show how graphically superior the PS3 is over the XBOX. Infact here is some news, games released on both platforms are created for the XBOX in mind, this is because when creating the code they work using the graphic capability's of the 360, this is because it's the lesser machine of the two. If they created games with the PS3 being the benchmark then the 360 would only see half the games released.
5) having both consoles sitting next to each other does show how cheap looking the 360 is.
6) the PS3 Slim is Silent, I mean its totally silent, the 360 when turning on or just sitting idle is noisy. When I first got my 360 I honestly thought it was broken it was so noisy.
Overall now is the best time to get a PS3. They are now at a realistic price of £250 for a 250GB PS3 slim. Im happy with my purchase and only wish Sony had released their console at a realistic price when they first launched the PS3