Scale figs

So I took a few pics of some of my figures to compare sizes. Left to right: Heroclix (32mm), Bluemoon (28mm), Battlefield Evolution (25mm), Airfix 1/72 plastic (2omm), Rebel Minis (15mm), Axis and Allies (10mm).

I like the fact that I have a TON of prepainted hero/horror clix. I don't have to paint them and they match up well with 1/43 scale vehicles and O scale train buildings. The 15mm match up well with HO scale buildings and 1/87 scale vehicles. But I have to paint them and they are REALLY small. The 1/72 scale plastics have lots and lots to choose from and they match up with hotwheels nicely. So what size should I really go with? Obviously, this blog is about using 15mm figs for Savage Worlds but I'm still not completely sold on it...