Need Ca reactor input

Dear All:



After much research, I've decided to purchase a Ca Rx for my 190G reef tank. I have mostly softies, 13 or so fish (mostly Tangs), anenomes, etc. all controlled by a Neptune Apex.



So far, I have decided to get the following (I am not limiting my budget):



Neptune pm1

Neptune pH probe



For the Co2 tank, I will go to a local beverage supplier, and get one from there, as I understand the C02 they use is a better (food grade) than I'd get elsewhere, and I don't have to be concerned with safety regulations, etc. and get the tank tested every year. I'll just swap tanks when I need a refill. In regards to the tank, does it matter if I get a 5 pound versus 10? I'd rather save the space and get the 5 if it doesn't matter.



Aquarium plants Carbon Doser Electronic Co2 Regulator w/8 digit LCD Counter (non-solenoid FYI, but they say that it is the best out there and that non-solenoid is referred due to longevity).



10' C02 resistant tubing (is this feet of tubing enough if the tank is going to be in the floor below the tank (basement)?



Aquarium plants check valve (medical grade 0.17 psi CRP).



I AM NOT SURE WHAT REACTOR I SHOULD GET. I do want a dual chamber, and have considered:



Super Reef Octopus Super CR 3000D

Marine Technical Concepts ProCal

Vertex (Bulk Reef Supply) RX-C 6D

My Reef Creations CR-2 Dual Reef Creation

Schuran Jetstream 1





I am open to ANY recommendations that are not listed above.



Also, is it agreed that I need the first few items listed?



ANY input is greatly appreciated!