Rinconman,
Discos are heavy for their size. I hadn't thought that much about it until a coworker recently mentioned his full size Ford's weight, which was about the same as my 'little' Disco. Are you going to be in the mud much? The Toy might be better for that, and will be able to fit larger, wider tires a little easier.
I was getting the same mileage as Binary up until I put on the roof rack. That's premium gas, too
The Disco will definately get you around in style. Lots of aftermarket options, too. Perhaps more than a 4Runner. The Disco Series I (US '94-98ish) has some issues with rust (dissimilar metals), but overall it's solid. LR's in general are solid vehicles. Just look at how many of them are still tooling around remote parts of the world. Of course, I've also driven some 'yotas in far off lands that were very capable despite years of neglect.
LR ownership is an emotional issue, not something that logic will help you decide upon. Everyone of us loves these beasts!
Good luck!