I looked at those plus the RS XXL900. I ended up going with Crystal Dynamics (see my build thread). I will also mention I currently have a Waterbox 40 gallon & have had a Red Sea 50 gallon in the past, no complaints with either.
Here are the main reasons I went with CDA.
1. The ability to design or have input into everything is really nice when you are moving up to a tank that size. Tank dimensions, endless... Stand design & color, Type of plumbing & size, Manifold, Overflow, Sump brand & size, skimmer, dual returns, etc... You have input into all of it.
I did not think this was a big deal at first but now that we are moving forward with the build I have no doubt it will save me a lot of money down the road. No need to modify things down the road.
2. I don’t trust either stand at that size tank. (See the countless threads on damage & leaks ) I am really referring to long term here... Are they going to hold up several years & are they moveable if needed? That is a lot of weight & overtime with water damage I’m concerned. I also don’t want to deal with an issue 2-3 years down the road when your tank is starting to thrive.
3. I wanted to support a product manufactured in the US & help support local businesses because of COVID. I know many of the reefing products are made overseas & I don’t want to get political. However the tank & stand were the largest dollar item of our build and I am so glad we decided to buy American where it was an option in addition to reason 1 & 2.
Do yourself a favor and at least call Zoya at Crystal Dynamics and test the waters... You might just end up with a tank & design that you can truly call your build.
There are other custom tank mfgs also, sorry not trying to exclude them... My research directed me to CDA and I can’t say enough about them so far during the build process. Both Zoya & Trent and been amazing & helpful with our design.
My tank will be delivered this week so more pictures coming.
Good Luck with the decision! I know it’s not easy, I struggled with it as well.