I would be careful, i've found that the old bolt action are definitely smaller than newer bolt action, in some cases the gap isn't too pronounced, in other cases like the old chindits and the newer Australians, they are pretty much different scales(ive heard that the sculptor of the newer aussies is used to 32mm) I wouldn't mix those two latter ranges.
Personally I'd go with empress, and if on a budget, empress for hq/specialists and warlord for line infantry.