I advise the 360. Especially since the new 360 S is the perfected form of the 360.
Better online community, a couple exclusive titles(Such as Halo...even though I dont like it), the communities are larger for the 360 than the PS3.
The general perceived image of them are 360 for gamers, young adults(18-30) and the PS3 usually gets picked up by the same people who prefer using Mac, or are older and not really into gaming. In fact if it was not for blue ray the PS3 would probably only have half the sales it does.
I have played both, and prefer 360. For some reason most games look a little better on the 360 than the PS3(sometimes even, sometimes PS3 is better, but most often 360 has the edge).
I have a PS2, 360, Wii, a PSP(which I love!), and want a PS3 but it really has nothing that says "Get it now". Its kinda like if they release the right exclusives maybe I will save up for it over time. Not a fanboy by any means of a particular system, because I love sony for the PSP and PS2(which I liked over original xbox btw). But the 360 is just too damn...nice.
PS3 free online play
360 50 bucks a year
On that note, the PS3 has a habit of their online crashing when a new game comes out(I think when MW2 came out in Britain it it was down for a week lol).
360 I have never had an issue, and my 360 is wireless internet. No lag, I was impressed. It can also use USB sticks to expand memory or save data to, it can link to your computer and pull of pictures or movies, or even music.
They are both nice, and I would like a PS3 someday, but 360 was and is my first choice. Had one since 05, yeah a couple died. But they repaired em for me. Now that the 360 S is out I have heard of zero issues with them.