We are purchasing two Pali cloud cribs for our twins - due in January. We're deciding between the Colgate Classic 1 mattress recommended in Baby Barg. & one recommended by the store called Baby Time. It also is a foam mattress (5 or 6 inch thickness available) & the store claims it is more firm and will appear with favorable reviews next year. It is $30 more, which we don't mind if the quality is worth it. Any thoughts? Also any feedback on our cribs (in white) would be appreciated! Thank you. (Can you tell these are our first children?)