From my own experience (E8000 and GT50), I would try the E7000 if you want all the gadgets/apps and hope to get a quiet one. I would also do it with an easy to return company (I used Best Buy).
I switched to Panasonic due to noise levels that bothered me with the Samsung(s) (3 tries). My GT50 has a great picture, is much quieter, but less gadgets and the initial Samsung picure made a better impression for 2 and 3d.
They are both nice sets so you can't really go wrong.