Thanks for the reply guys.
Ftransform - I'm not sure about running Smoothed DC Through them, It wouldn't be too hard to do, Although i don't think it would give me better results.
Phil4107 - I was thinking that, Although i don't have a Variac, and they go for silly prices where i live !
IanB - I never thought of that, That could definetly be something i look into as its cheap & would be effective.
Balaur - Thats probably the easiest way, I didn't know such things were available so cheaply ! Most probably the method i will use, I'll probably test it with the light dimmer as Ian suggested, just to test if i can get up to the temperatures i need too, Then if my design is good enough, i shall buy one of these !
Thanks alot for all the suggestions.
Many thanks,
Stephen