My only other comment is that the heads are small compared to figures from other companies, so they may look strange if you want to mix with other lines of figures.
Yes, but there are plenty of manufacturers that offer seperate heads now:
a head swap I made, creating a 40K Praetorian Guard:
(http://i298.photobucket.com/albums/mm262/geudens_photos/preatorianscarlet02-1.jpg)
or a desert trooper:
(http://i298.photobucket.com/albums/mm262/geudens_photos/preatoriankhaki02.jpg)
Some of the legs will even fit saddles, without cutting or converting:
(http://i298.photobucket.com/albums/mm262/geudens_photos/british01.jpg)
Rudi