camera is only as good as the glass in front of it. so look at Nikkor and Canon lenses, although they are both very similar, but do work out a package and see if what you want is within your budget.
eg.
I wanted the 24-105mm f4 IS for video, whereas closest Nikon offering is 24-120mm f4 VR which doesn't get as good reviews.
the Nikkor 16-35 f4 VR is something I drool over, but slightly too expensive for something that's not walk-about. 17-40mm f4's price is more acceptable, so had to settle with this.
also, work out which of your friend is more willing to lend you their gear.
I first bought D3100 to start photography, thinking I could borrow from a friend who owns D300s. turns out after a lot of hinting, it's not going to happen. Totally understandable, I also won't lend anyone my 24-105, but still quite frustrating. I switched to Canon so I could use my lenses with my parent's Canon 300 film SLR. also I can get the 135 f2 if I asked another friend nicely.