i have the 800T.
width, 370mm. depth, 265mm(but space needed for connectors and cabling. height 67mm, but it will get hot if there isn't some clearance above it.
New TV stand is probably a good idea, the stand that came with mine had two shelves. i currently have freeview stb, cd player, amplifier, dvd player, laserdisc player, mini computer, gamecube and D.A.C. on my stand..... And a TV of course
not sure of a limit on timers, i've not run into one. you can set to repeat daily and weekly.
You can connect your DVD recorder to the second SCART socket to record the freeview signals.
The display is about 18mm high, i can see it from bed with glasses, but not without! it does indeed show channel number when on and time when in standby.
I had no problem removing additional channels, and it doesn't re-scan in the middle of the night or anything like some boxes.