For the last couple of years I have had a 7.1 setup that I've been very happy with. I have Kef eggs and sub for the 5.1 (2005.2 + PSW2010) and then for my rear speakers I have a Bose cube 2.1 that are mounted at height and pointed directly down at the sofa which is up against the back wall. All was going well until a fortnight ago I bought an LG OLED55C7v. Then I got unhappy with my AVR and have bought a Denon AVR-X4400. Then I wanted appropriate sources to make the most of it all so am going to get a Panasonic DP-UB820. I don't think we'll stay in this house for more than another 18 months, so I'm not going to put in-ceiling speakers. We have two very tall bookcases flanking either side of the TV (which has the front speakers on a shelf about 60% up them) and my thought is to change the current 7.1 into a 5.2.4 by changing the rear speakers into rear height ones (which they were anyway) and then adding 2 new speakers at front height. The TV is around 3.5m from the sofa. 1) Would I benefit from front heights on top of the large book cases, or would it be overkill? 2) If I would benefit, would a good Dolby Atmos experience be possible? 3) What speakers would be best? New Atmos speakers on a lower bookshelf to bounce off the ceiling? New speakers on the top of the book cases angled down? Or new fronts and move the current front eggs to the top of the bookcases for height? I realise budget isn't mentioned. At the moment I'm trying to work out direction for it all and then psych myself for paying out. This month I was meant to be saving money, which really REALLY hasn't gone well. Thanks in advance!