hi newheart,
storage, thats a big discussion, depends what you're collecting, but what you linked is ok for circulating coins, you might be better using a company like http://www.duncannon.co.uk/ for lighthouse stuff, but people will be able to point you the right way, proof coins would be better kept in coin capsules,
a slabbed coin has been graded by a 3rd party company and them sonically sealed into a tamper proof coin capsule, or whats called a slab, https://www.ebay.co.uk/sch/2000s/141155/i.html?_from=R40&_nkw=ngc+coin