Hi g1981c,
These are all preference choices so if you are comfortable with the idea of modal (and there are many who are including Sleep1 here) and with jersey knit (stretchy like a T shirt) and with the quality and value of what you are buying (based on the conversations you have had with the retailers or manufacturers you are considering, their knowledge of their products, and your comparisons with other similar products) then nobody else can decide if these are good choices for you but you.
Phoenix