Toyota's are sweet trucks, definately what I would get if I didn't have a Rover.
You will find that the Tacoma is small and not nearly as comfortable as the Disco. Also, my dad has a Tundra 4-door, while that is larger than the Disco, it is not nearly as comfortable, you will feel like you are driving a bus -- or like the old lady behind the steering wheel. The window levels are much higher than the Disco, you have very bad vision while in the truck. Also, the gas pedal is much more difficult to deal with while off-road.
These are opinions, but I have driven both the Tundra and the Disco and the Land Cruiser extensively. The Toyotas are very good trucks, good off road, but not nearly as good for the driver.