Those miniatures are a little bit small compared to the
GW models and dont come on the square bases but you can put them on square bases.
Lots of people like the perry miniatures though and use the knights they make. Again they are a little smaller even though they are the same scale but I think thats because games wokrshop is a 28mm Heroic scale.
I like the foot knights they make and would use them as greatswords models even tho they are smaller.
Here is a comparison of the knights:
http://s50.photobucket.com/user/beastherder/media/Modellen/Historical/DSCN4951-.jpg.html
Just google some comparisons of the foot guys vs halberdiers or something there are quite a few examples. As long as you make your units all Perry then you should be okay