Knowing that Quartino was considered is helpful but maybe throw in a few more details--price range would be a big one, type of food/atmosphere (traditional sit-down dinner v. something more edgy/creative, continental-type cuisine v. asian/other ethnic, etc.). And for boundaries, River North is a little vague--maybe give a boundary of how far south/east/north/west you would consider. Like would south of Michigan be considered as long as it was east of "X"?
My immediate thought was that the Gage has a great room downstairs and a fun menu--but I wasn't sure if that was too far south for you.
Most of all, congratulations!!!
"Knowledge is knowing a tomato is a fruit; wisdom is not putting it in a fruit salad." Miles Kington