Yeah, I have the reaper Zulus, and they're pretty spot on for the DL minis. I'm already planning to use them in a scenario. The other Chronoscope British Infantry are close too.
I haven't gone outwith Reaper yet for other minis to use with these guys, but I have some Victoria Minis parts, and they seem to scale pretty well, if not a bit chunkier than the Spartan minis.