Ok, firstly I'm not a fanboy, as I have BOTH, an Xbox360 and a PS3.
I have the Xbox first and loved it. Great graphics (really sharp, in some cases a bit sharper than PS3). Had loads of fun on it. But it RROD'd (broke) on me 3 times in 2-3 years. Having to send it away for 3 weeks at a time became no fun. It even crashed a few days before the launch of Street Fighter 4 (I had the game posted to me the next day and couldn't play it for 3 weeks whilst Microflops 'fixed' my Xbox.
I got tired and decided never to buy an Xbox game again.
I bought a PS3 slim when Unchartered 2 came out, and was blown away. Not just by the gameplay, but also the FREE and easy online options the PS3 gives. I had never played onlone wiith hte Box because I needed an Xbox antenna, and then a membership fee etc.
The PS3 has been my main console for the past 2 years and I Fu**ing love it. Great exclusives, great features too.
I say get a PS3 mate. But if you get an Xbox360 make sure its a new one. The oldies were sold broken.