Most people I know are raving about this place at the moment, a friend was there yesterday for lunch and said 'it was even better than last time':

http://www.thechasetoronto.com/

Celeb chef-wise (I am not sure if he is celeb enough) Daniel Boulud's place in Yorkville (short cab or subway from the hotel, nice neighborhood to hang out in)

http://www.cafeboulud.com/toronto/

There's also a Jamie Oliver Italian restaurant (but I haven't been there)

https://www.jamieoliver.com/italian/canada/

Cactus Club Cafe is the second one to open (there's another in Vancouver) and is owned / run by a former Iron Chef, Rob Feenie. I ate there for the first time last month, and it was pretty good - not high end food, but well executed. Very busy place for the after work Bay Street crowd, no idea what it is like on weekends. Decor is very cool.

https://www.cactusclubcafe.com/locat...anadian-place/

Mark McEwan's Bymark Restaurant is pretty popular, I've had some good dishes there. Also tends towards business crowd.

Let me know if these are hitting the spot.

Ki is a higher end Japanese people like (I don't like Japanese), Canoe has a fantastic view of the city and good food, but can be a bit stuffy (lots of business lunches / dinners), Hy's is a good steak place.