Hi Thinxs,
You are limited by your budget so the only landrover discovery or toyota landcruiser for that price will spend most of its time in the garage (especially landrover), a decent medium size 4x4 which is very reliable and practical and is available in your price bracket (I have owned two over the years in Australia and Uk) would be a mazda tribute, they often come onto the market with low mileage (punch it into autotrader) and dont cost the earth to run unless you go for the 6 cylinder petrol.
Good luck with your search, and if you do find something worth looking at take a competant mechanic with you so you dont buy a lemon.
Cheers......Ant