You're probably aware, but just to be clear my new pack shown above is a Catalyst - one size larger than Mike's Circuit. So imagine the Circuit fitting between the the Ohm and Catalyst in my lineup picture. I think it's about the same height but narrower.
I've carried an Ohm and a bear canister on a few occasions. The longest was 4 days, but I had most of the food for two so it was close to an 8 day supply (no it didn't all fit in the canister, does it ever?). The trouble with an Ohm and a bear canister is that most (all?) bear canisters have that ridge in the middle. The ohm has a thin back pack (1/4"?) so this ridge pokes/rubs on your back and there's really no way to pack it so it doesn't.
I personally don't think the Ohm is that bad at 35 lbs - and that's the regular Ohm, not the cushier Ohm 2.0. So the weight of 8 days of food and a bear canister can work if you've got a high-ish discomfort tolerance and it's not a long term situation. Almost regardless of packweight, I find the ridge on the canisters to be more of an issue. I usually get a little spot rubbed red on my back from it, so I pack the pack differently each day so it rubs in different spots. So for occasional bear canister use the Ohm is fine, but if you're using a canister regularly then I'd look at getting a canister without a ridge (if they exist) or getting a different pack.