Ozzle, Sculpey, prosculpt

I currently use a mix of :
Super Sculpey
Prosculpt
Artists Ozzle - This is an Australian made polymer clay and is extremely strong, it's a very hard clay and i recommend using a clay softener which ozzle also make.
I don't use prosculpt on it's own and only add it to the ozzle for the softness...it helps to soften the ozzle.
In my experience prosculpt can be very temperamental and cracks always occur in it, a lot of sculptors i know have said the same.
So if you don't mind a hard clay then try Ozzle they sell on ebay:

http://stores.ebay.com.au/The-OZZLE-Polymer-Clay-Shop

Another great thing with this is that it's the manufacturers that sell it and if you ever have questions about it or need help with it Mark will get back to you straight away and he is really helpful.
Price wise...really great a large block will cost $28.95 AUD this is not for the usual size blocks come in...this is for 1kg not 1lb!!

I have tried Kato too...its very hard clay and takes a lot of elbow grease, seemed strong but the one thing that turned me off is the smell when baking... quite fumy and strong

Sounds interesting!!! I do prefer the harder clays.... I just can't get anywhere with the squishy softer clays... Me & them just don't mix!!

OK! I'm off to check out the Ebay store you've suggested Linz... Thanks for adding the link.