Which is more rigid? Onefinity Pro, CNC4Newbie New Carve, or Ultimate Bee?

I have had an XCarve for years now. I need something more rigid in a 4’x4’ size. Due to budget constraints, I’m looking at utilizing my old XController on a new router frame. Basically, I’m looking to find out which unit has more structural rigidity. The Onefinity Pro, CNC4Newbie New Carve, Ultimate Bee, or something else? These are all available without a controller and without a controller included they are all within my budget. (<$3k)

I’m planning on a water-cooled 1.5kw spindle. I’ll mostly be cutting cabinets and carving reliefs in wood for my home build.

It might be worth your while to take a look at the AltMill from Sienci Labs.

I was actually on their list until I figured out it was likely going to be a 5 or 6 month wait time.

Edit for reason: I’m hoping to get some work done inside my house this winter.