I have been using the Canon EOS system since 1986 when their first auto focus EOS 650 was launched. The beauty of a decent digital SLR system is the lenses are 'mostly' inter changeable so once you have invested in good lenses if you upgrade or re-new the body the lenses will still fit!
Try and buy the more expensive lenses. The quality of the glass used in the optics is always far superior and will ultimately reward you. Also if you wish to sell 2nd hand they hold their value remarkably well. Buying fast lenses
(F2.8 or below ) will be a benefit in difficult low light situations too.
I have progressed through EOS 650, 600, 1' 1N, 3, 10D, and now on a 40 D and would recommend Canon to anybody looking to buy their first DSLR. They are very simple to operate fully auto or can give you as much flexibility in your photography as you want. Hope you get want you want.