none will record to a NAS drive as it would get in the way of copy protection.
most TVs can record to a USB drive but that drive can then only be used on that TV.
If you are wanting to control things via HDMI CEC then I would avoid Panasonic as my experience with them is terrible. My sony works great though with Denon and Samsung devices connected.
Not all TVs have all the catchup TV players. All have iplayer but not all have ITV, 4OD and 5 as. The Sonys with android built in might do as they have a youview app. Our standalone youview box is better than any of the TV players but no idea if the one built into sony android TVs is as good.
For the speakers I would just go with something like this: https://www.richersounds.com/product/av-receivers/denon/avrx520bt/deno-avrx520bt-blk
I have had this for a year or so and it is excellent: https://www.richersounds.com/product/av-receivers/denon/avrx2300w/deno-avrx2300-blk
Marantz do slimmer AV amps but RS cheapest is £299. Take a look on ebay for a cheap HDMI capable reciever on ebay local to you. They tend to go pretty cheap. Onkyo, Denon, Sony, Yamaha and Pioneer all worth looking at.
Or just get a sound base if you have room and sack off the speakers?