I have a Minolta 70-210 lens and a 28mm wide angle lens would this be worth getting a Sony vs Canon or Nikon?

I am an amateur that purchased a Fuji fixed lens digital camera 5 years ago because I couldn't afford a $900 DSLR. I now would like to purchase a dslr. I love my friends' Canon Rebels but since I have the old Minolta lenses should I go with the Sony? This may be my last camera purchase so I need to make a long term decision. I take mostly scenery, people, and dabble in some close-up nature shots.