What are you wanting to use the reactor for? Do you have a need for one?
I used a TLF Phosban150 on my old tank. A lot of people like BRS reactors. There are reactors for zeo products, biopellets, gfo, carbon, calcuim, kalk, the list goes on.
I actually don't have my tank setup yet, when I had my 150 I never get around to drill my sump and plug the three reactors using carbon, matrix and another media of my choice, now I got the extra reactors for my built and want to be able to get the best clean water I could in the system, I will run a kalkwasser reactor and Calcium reactor, then I recently got a denitrator to keep nitrates low when the time comes.
I was suggesting the MRC brand cause of their quality.