They are both great and will do more than you will really ever need. I bought my parents the rebel XT because I like Canon's lenses better than the Nikon ones but I'm kind of picky.
Best of luck... this is how I started and the next thing you know I've got about $80K of camera gear!
14 Tesla Model S P85D Black/Grey (691 hp
16 BMW X1 Med Blue/Oyster (Hers)
PAST: 13 X5 M-sport, 04 M3 Cab, 08 E92 M3, 08 535xiT, 07 X5 4.8i, 06 E90 325i, 87 E30 325i, 85 E30 318i