I know this comment will get a lot of "my Canon lens(es) weigh over 2lbs each!" responses, but personally, I've found that on the e-m5, I'm not comfortable with a lens that weighs more than 300(ish) grams. I'm thinking the grip may alleviate this (I've not tried one), but I find that anything heavier gives some balance issues that make the camera uncomfortable in my hand. Thoughts? Do I just need to go to the gym?