i was cross shopping LC80s and 3rd gen 4runners against Discos, and I ended up with a 96 Disco. I picked up a near mint, lowish miles, one-owner all dealer maintained truck for less than half the price of a beat 200k LC80 or 3rd gen runner.
Whats better about the D1? Well, I think it's more comfortable and way more refined on the inside with better quality materials, etc. I also like having something that isn't super popular on the roads.. I get more questions about my stock D1 than I did both of my built XJs and I've only had this thing for 6 months. My 96 is a pre-GEMS truck (OBDI, dizzy and coil, not coil-on-pack w a computer controlled ignition) and is a bit simpler than the newer ones. The D1s also have stronger axles than the newer trucks (full float rear) and the LT230 is a beast of a tcase. After driving both LC80s and my D1, the D1 feels like it has more grunt. I got 18-19 mpg highway driving to Rausch last weekend. I think Rover people sell the trucks short, saying they're delicate, blow head gaskets every day and whatever.
The LC will be more reliable, easier to get parts for, etc. But a beat to shit LC is no better than a well-maintained Rover IMHO. Someone on ExPo said it best, they said yotas are great appliances, they work and they work well. but thats also how they feel to me, like an appliance. the disco has a soul, and it seems to be a good one (to me at least) so far.