I have a Landy 110 and a Defender and I used to have a Trooper LWB 2.8 TDI. The trooper cost me 2.5k had a 100,000 miles on it and the engine was/is a gift from the Vreus (Greek god of engines) I tugged a Ribtec Camel around Ireland and Britain (2800 miles in 10 days). The Trooper never missed a beat and didn't really recognise the Camel was on the towhook. Old Patrol's are rather excellent also
Unfortunately the Trooper did not enjoy being immersed in water and badly failed it's MOT. I one day will put the Engine into the Landy
Having said all that both the Landy and Disco tow fine. So I kinda agree with Jono but would reccomend a Trooper