Tyre choice really comes down to too many things for advice to mean much!
Personally speaking, I believe BFG tyres to be over priced! There are other great tyres out there at a lot less money!
If you are using it as a daily driver, then you will go through a set of muds quicker than most, avoid the ones that are on the more extreme end of huge lugs, they are noisy and will fall apart with lots of road use.
Also I would avoid remoulds, they wear catastrophically fast in Mud Terrain guise.
Cooper do the STT which is what I run, great tyres, rarely get stuck and only if running road pressures!
I also have mates that use the ST which again are great tyres and it needs to be really deep mud to stop them! They tend to go most places I do on the muds, a great AT pattern.
KL71's also get a good write up, coming equal 1st with BFG muds in a back to back magazine test. I discounted these because they are directional tyres, so possibly leaving you with a spare facing the wrong way!
235.85's will fit a Discovery BUT!!! Your suspension needs to be top notch! otherwise a 2 inch lift is recommended. Also you may need to "camel cut" the rear panels depending on your wheels.
I run a 200Tdi with new suspension (not a lift) and 235.85R16's on Discovery steel rims. They do foul the radius arms on full lock but even on full articulation off road I have not ripped my rear wings apart as I have seen some do, usually because their suspension is tired or they have bigger offset wheels.