Which Calcium Reactor for 58g SPS tank?

[greenlm]

Trying to decide on a calcium reactor.

Some that I have seen that looked good where:
-MRC C1
-MRC C2
-MRC Dual Nano
-Aquatic Systems Design Single

Any other recommendations?

I would like to get something just a hair bit bigger than what I need, as I will probably be adding a 30-60g sps prop tank on to the system later on.

Also, trying to keep it under $260 for the calcium reactor unit if possible.

Thanks