Here's a neat temperature controller that was discovered by Jim H.  check out his site here.  I modified a regular outlet so that each plug is independent(just break off the tabs).  So now one outlet is for the heater and the other is for the chiller.  The controller was $91.77(w/tax) and I have another $10 in the outlet and box.  So here's a $100 dual stage controller!  This unit is sold through Johnstone reps and is made by Ranco.  This dual stage is a Johnstone model L38-714.  They also make a single stage model L38-382 that runs about $45.

Here's the wiring diagram for how I wired the controler:  wiring