Click and collect is becoming a thing, but I think I've used it once and that was due to it being an online only deal and was a 2 TB HDD for about 2/3rds what you'd normally pay.
Argos - not sure we have exactly that sort of thing but the likes of Costco and I think Walmart might be coming over - the general idea being one huge warehouse type setup for a region that sells normal groceries in bulk buy package sizes (Costco) and with Walmart the idea being that it sells everything from groceries to lawnmowers and tools.
That's an amazing price... but for "smart" blackbox video devices Wifi is a way more desirable option. Looks like that TV is fairly minimal with the extra features but at the price you could chuck an extra few hundred @ a 4K media player and still be going alright.
I've got 2 cordless sets here which I've been tempted to just throw out. The only time I bother using the landline is if I want the guaranteed clarity of signal and using a cordless is often as bad as a marginal mobile signal.
I've been meaning to test it but for games and SSD won't necessarily mean big decrease in load times. Often there's decompression going on, generation of shader commands and transfer of textures to the video card.
But it's up to you - these days with the 120 Gig ones starting a little over 60 bucks, no reason not to at least use one for the system drive.