I've been thinking about getting some headphones for some "Me Time" listening at night. I'll be hooking up to either my SX-750 or a SX-535. Neither one has lots of power out to begin with. So I can't imagine the phone out jack is going to put out much power either. I am trying to find out if I should find some low impedance or high impedance headphones. Or does it really matter. The only spec I've found for the 750 is that the phones out jack is "Low impedance". Should I go with low or high impedance headphones? I'll most likely be buying new. I've been looking at the Sennheiser HD 599 lately. They are on sale right now on Amazon for a decent price. Also looking at Sony MDR V6. Any other suggestions are welcome. Thanks everyone.