Ok, i'd go for the Jeep mate, has to be a 4.0 high output manual, although the autos are still good for a bit of fun when in 2wd. Nothing is really over-complicated either. it's all very basic when you look underneath.

Maverick, well, i hate them with a passion they're dead slow and not the best at towing, infact they really do struggle.

Land Rovers, for £1k your looking at a bit fo a dog tbh, old discovery's are best avoided tbh, they really do rust like no tomorrow and are just not worth it, it might have a V8 under the bonnet but still doesn't make up for the car's lame-ness.

Frontera, i like these alot, but the engines really aren't anything exciting and i'd be suprised if any of them could pull the skin off a custard, that said the 2.0 & 2.2 goes go alright but i suspect it'd really feel the strain if towing.

Avoid Troopers, they rust like no tomorrow just like land rovers.

Thought about a old hi-lux or even a land cruiser? theres a 4.2 1993 in my local paper for £3k which is cheap for one of them, i know it's waaay over budget but they're very capable machines, esp. when towing.

EDIT: that disco looks good for the moeny, if you do go looking give it thourgh going over, take a screw driver and whip up the boot floor carpet when on testdrive, this is where they go and not often detected until very bad as it's above the fuel tank so all the mucd and shit gets trapped in there, the supporting strips between the chassis that the boot floor is welded to also rusts way. inner sills, front floor pan, rear wheel arch inner chassis legs and bulkhead are all favorites