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.
If you want a DSLR nd you can afford it, just get one. There are no bad DSLR's. And like O|||||||O said, they're basically all the same.
Only advise I can give you is to get a Nikon or a Canon. If you get more familiair with the DSLR you buy and when you know what type of photos you want to make, you will probably want to buy some extra lenses. Canon and Nikon have the widest range in accesoiries and lenses, from those brands themselves and from other manufacturers. You will know what you'll want when you have used your DSLR for some time.
As jeroen alluded to Canon and Nikon about equally split 75% of the dSLR market.
I'm not sure how to interprit, "I'm trying to get into photography seriously". If you're serious, it's like Yoda said, "There is not try, there is only do."