Hopefully you did some shopping around and did some extensive reasearch because I found Lens and Shutter to be very informative but stay away from Broadway Camera. BC are in it just to sell equipment.
I like Nikon.
You can use generic lenses like Tamron where they are cheaper but you can't beat quality in a ( which you will by) Canon lenses.
And sounding like a salesman: How much can you afford? What are you going to use it for? How often will you use it?