After must research I finally decided to take the plunge and invest in a FVP-5000T 1TB box. All in all it is a great box and I love the series record feature as well as Freeview Play. But there are one or two niggles where it lets itself down IMHO. No matter what I do I cannot get the box to see any 5GHz networks. This means that I cannot use the livetv app as my phone and tablet both connect to a 5GHz network. I'm actually using a LAN cable to connect to my router so it's a little academic.
Amusingly when setting up the initial screen resolution it offers 2160p as an option but this defaults the box to 576p I was briefly excited that they may have sneaked in 4k support for playing external media but it looks like a simple programming error.
Don't get me wrong I really like my FVP-5000T but the Humax developers do seem to have missed a couple of tricks.