Id like any of the following:

-ACJR with temp probe, serial port, cable, DC8 or an AC3 but doubt anyone will give up an ac3
-Vortech MP20, MP40, MP40W depending on the condition and what comes with it
-Zeovit Reactor > Looking for the ones that are automatic
-Tunze Wavebox OR Tunze 6100 or any other controllable Tunze in that range
-OR 1/10th HP chiller by Current USA

In that order!

Let me know if you have something available