Hi, I've a fair few Oly lenses + a flash but I'm looking at the GX7 to improve video. Is there anything (other than IBIS not being as good) should I know or worry about should I change? Such as lenses not working as well, or the flash not working at all. Now a good time as over here in the UK for three days the cashback is going up to £100, taking it to £300 after cashback. I could look at the GH3, but its a bit bigger than I'd want.