i'll second that,
i have a portasol that has been going strong for about 15 years now and is amazing,
the temperature is adjustable and is even hot enough to solder battery connectors to make your own nimh packs up...
i would highly recommend the portasol one, even guys at our track have borrowed mine and commented on the heat it produces and the speed at which its ready to use....
here is where i got my spare tips from and this is where you can buy the iron......the link is to the page selling the iron.....
http://cpc.farnell.com/_/portasol/or.../dp/SAPORTASOL