Well, your choice of course but why have lovely structures, landscaping and trains and then go and put cheap looking vehicles on your roads and parking lots? To me they stand out like a turd on a cream pie. BTW, I have the Dodge van from Brekina and they are truly beautiful, accurate to scale models.
Cosidering those hotwheels and matchbox cars scale out about to S scale, they look horrible when next to HO scale counterparts and people. Only some of there trucks are close, but they need new wheels and tires atleast. mh