In my opinion, as soon as you mention margin, Interactive Brokers is the place to go, especially if you have a six figure account. You will simply never match their margin rate.
I moved from Questrade to Qtrade, and I find the options process a LOT easier on Questrade. That being said, all I do is sell very basic covered calls. So, it's not an absolute necessity for me.
I think Interactive Brokers also has the cheapest options fees. Overall, their platform is great for traders, but as Mat said can get quite complex.
If you're looking for option opinions, hop on to the Discord and go to the options channel. That's the easiest way to get a hold of others who may have experience with different brokerages, as I only have Questrade and Qtrade, of which I'd give Questrade an 8, and Qtrade a 5. But, margins rates are very high at Questrade.