a new ps3 alone is 300 bucks
If you already have a 360 then I highly recommend getting a PS3. It truly is a great console. But the 360 is just as good: better in some ways, worse in others, but overall just as good and it's cheaper. Not to mention the ever expanding Halo franchise that you'd miss out on without a 360.
when you get enough money (prinplup pointed out your problem) get a PS3. it's got many great games such as inFAMOUS and LittleBigPlanet. it comes with 1 controller and the cords to hook it up to the tv. thats it.
Halo is ok but it's not everything it's hyped to be. don't get me wrong, its an excellently crafted shooter but it could've been much better
MW2 makes my day much better than Halo. Also, other nice FPS's are Killzone 2, Operation Flashpoint: Dragon Rising, and MAG. /spam :P