The 360 is by far superior. The 360 has been out for the same amount of time but the 360 not only has more games, and from what a friend... er, smei- friend, it's faster, too. And, there's ofcourse Halo 3, which will never in a million years be ported to PS3. So, if I were you i'd go with the 360.
Why hate them? Both are good and have good games. Just because you have a Wii doesn't mean the other two systems suck. It simply means that you don't have them.
Go play Halo 3 when it comes out. I bet your hate for the Xbox 360 will be challenged and tested just a tad. Even if you aren't a fan of the series, or Xbox in general, it will be hard to deny that the game is going to be absolutely HUGE. There are well over a million pre-sales already. There's not much to hate about the Xbox 360.
As for PS3, it's much newer than the 360, yet a lot more powerful. Once game developers are able to tap into just how good the PS3's hardware is, games on the PS2 will easily blow away games on the 360.
The only thing the Wii has that the others don't is a motion sensing controller. And btw, if you didn't know, PS3 has that as well, only built into the controller.