I have both the Preonic and the Planck. Between the 2, I prefer the Preonic mostly because I didn’t want to access my numbers with a layer (that was just personal preference). I bought the Preonic with a polycarbonate case which was not available with the Planck. I would recommend a super quiet switch like Bobas U4s due to how load the plank case is: https://www.rgbkb.net/products/rgb-silent-tactile-switch
I’m more partial to split boards since I find them far more comfortable, so neither one of my one piece boards will be my daily drivers.