Hi Chris, whichever you choose, you'll need a tug which ways in at at least 1535kg, which will give you an 85% figure of 1305kg to match your van. Nosewieght is also an issue, as ideally the 'van should be towed with a 7% noseweight of 91kg - which is well above the average for most cars, but within most 4x4's capacity, but do check these figures before you buy. A big saloon or estate will be cheaper to run than a 4x4, if you use a lot of CL's and intend to caravan all year round, then there's nothing to beat a 4x4 for getting off wet grass. If you do a lot of solo motoring then a car may be better, generally 4x4's offer better towing stability due to their much higher kerbweights and torquey diesel engines - it's all a matter of choice.