I'm looking at bathroom vanities, specifically 60" double sink. I've seen some where the sink bowl depth is only 4 or 4.5 inches. Is that too shallow? This one says the basin depth is 5"

https://www.fergusonhome.com/miseno-mvt-60d-313sq1hss/s1929247?uid=4558820&_gl=1

but the spec sheet shows it as 4.2"

https://s1.img-b.com/build.com/mediabase/specifications/miseno/1929247/miseno-mvt-60d-313sq1hss-specification-sheet.pdf

Another thing is that many of them don't have any back panel. They're advertised as "easy access!" It bugs me. I'm looking to spend less than $2500 for vanity and top. In that range I see a decent variety of wood vanities--not particle board or mdf. Maybe $3000 or $4000 vanities have backs. Does it matter? Here's one I generally like that has no back:

https://www.fergusonhome.com/ariel-t060d-bc/s1911631?uid=5248781