i have got a escort 55  and it is ok, i run a 400 litre system, (only ever fill it to 300, i bought it cheap)  the only thing i had to replace was the shock on the back but they where a £10 each on ebay new   so no big problem  u might have to do this, as chance are they wouldnt of been replaced,  i will take a pic and show u what the back of mine looks like,  not the worlds  biggest van, but i get tank, battery, reel and pole in,  plus buckets and trad gear, i dont carry ladders
if you can get the 75, as this holds more