Like @RideWithStyles says, I don't think you should get focussed on engine size. But you might bear the weight in mind. At 190kg, your last bike was a medium weight machine but add another 20 or 30 kg, and the experience could be different.
I think you're going to need to try some out to come to any decisions. If I were in your position, I'd spend a day at a place that has a large number of secondhand bikes for sale, sit on as many different styles as I can find, and then try to get a test ride on the ones I found comfortable. I think you'll be fine with whatever cc bike you end up with, but for your own peace of mind, do the test rides in order from small bike to large. You don't have to make any decisions that day, but I like to think you'd come away with more idea of the of bike you're looking for.