You didn't mention if you had a table saw. I don't have one and don't want one. The MFT combined with the TS55, although not a total substitute, is nearly perfect for me, and is the most used surface in my garage.
I don't need portability, so I took the legs off of the MFT and spent a weekend to build a cart with the MFT and aluminum frame on top. I can roll it around but don't have a need to transport it out of the garage. It is also much more stable. There are some good threads on the rolling cart. If you need to be able to fold up and put in a corner, maybe the MFT with leg braces would be stable, but I can't comment on how good they are.
Assuming you don't have a need for the MFT track/TS55 combination, I agree with Charlie1968's comments. The Domino is amazing and fast once you get the hang of it. You indicated you already have a workbench, so the MFT by itself might not be essential. I do make much use of the holes in the MFT top for clamping and wouldn't want to be without them, although I can't say I have ever clamped anything to the aluminum frame yet. Perhaps getting just the MDF top and putting it into some kind of rigid wooden frame on top of sawhorses would be a lot cheaper and easy to store.