The price of the Controllers shown above include a $50 FerroChrome Type-K thermocouple which will fail within a year or two, or you can have them sell you a controller upgraded with a Type-S thermocouple.
Norm and I disagree on the necessity of type S thermocouples, which is what makes this forum so great. If protected in a ceramic tube Type K's can last several years firing to cone 6 (depending, of course, on how often you fire), with perfectly adequate accuracy. I replace my thermocouples in my heavily fired kiln every 18 months or so, and have no inacuracy problems. 99%+ of all electric kilns use type K, without problem. Type K's are only $15. If you bump a type S and break it, you're out $250.