At this point in time, you might as well stick to your PS3. The Xbox really isn't offering anything compelling enough to justify a switch. The PS3 has more exclusives and most of the exclusives the 360 had have been (or are being) ported to the PS3 since. Plus, if your post is any indication, you don't seem like you have the money to spend on a Xbox Live account, so you might as well stick to the free online multiplayer on the PS3.
Really, the only advantage the Xbox has is that DLC is released earlier for it than any other platform. But considering that you seem to be limited on cash, I doubt that is a point of concern to you. And in other aspects, things have been shifting into the PS3's favour.
Really, the only advantage the Xbox has is that DLC is released earlier for it than any other platform. But considering that you seem to be limited on cash, I doubt that is a point of concern to you. And in other aspects, things have been shifting into the PS3's favour.