Don't take this the wrong way, but if you don't know which dSLR to buy - it doesn't matter which one you get.
What I mean, is that you're most likely going to be looking at entry-level or pro-sumer bodies (unless you want to drop $5k on your first camera), and they're all on pretty equal ground.
Any of the current models are basically the same. There won't be any mind-blowing differences. The buttons will be in different places, but that's about it. Some have video, some don't.
Once you have more experience, you'll know what you need, and you won't have to ask which body to get. You'll be able to just read the specs on them and figure it out on your own.