If the Viking feels good to you, then that is the one to get. You want something that you enjoy sewing with. Don't worry about what everyone else is sewing with at the classes. You don't even have to comment on why you didn't get the Janome. Remember, the sales lady is probably getting a commission or at the very least is being encouraged to push the one that their store sells.
Whenever I find a machine that I love to sew with, that is the one I get. I don't worry about what everyone else will think.