Matchbox Vs Oxford Diecast

I know Sapper Joe is a great believer in the Oxford 1/76th cars but I have never been convinced. They always just looked small to me. In my games I want barricades and road blocks of cars, I need something to hide behind. The big chunkier Matchbox cars seemed ideal. However it is getting harder and harder to get period Matchbox cars in good condition and at a reasonable price. So I have revisited the Oxford option (see my previous post). And am gradually coming round. There is a great variety of cars and the prices are reasonable if you can pick them up reduced. They still look a bit small though, no doubt due to my figs all being on Pennies. I am thinking of basing them on some of that Wills cobblestone plasticard. That should bring them up a bit.