With so many izakaya's to choose from in Toronto, I still think Guu on Church street is one of the best. My favourite dishes: kinoko bibimbap (basically regular bibimbap but with cheese), ebimayo, salmon tataki. Like most izakaya, you have to order a lot to be full, so you're looking at about $25-$50 per person.
A little crowded and noisy but it's a nice and fun atmosphere to dine at. I prefer the church location over the bloor location.