I have a mix of tubes and cakes, but prefer my tubes. The majority of my supply is Windsor & Newton, but I’ve spent the last year or so replenishing my stock with Daniel Smith. Seriously the most beautiful, intense, and breath taking pigments I’ve ever seen. 10000% recommend Daniel Smith! XD
I do have a bit of grumbacher as well, and find quite a handful of their student quality paints to be quite good, though the useable range tends to stay within the cool tones. This book here is pretty invaluable :
It goes through all of the major brands and their colors, having tested them all for their pigmentation, light fastedness, and other details, and ranks them.