I think the Prepac shelves will probably suit the type of shelf you are looking for, but the problem with Prepac shelves are that they are incredibly expensive and rarely ever go on sale anywhere. However they do look incredibly nice and the material used are way better than the Atlantic line of shelves, especially the newer models.
Here's a link to it on Amazon, but you're going to be better off trying to find it clearance in a store somewhere.
But this is definitely your guy if you're more worried about warping and quality over price, but damn are they pricey.
And since your collection is still rather small you can go with the smaller Prepac ones, but that's just a suggestion if you decide to go big all at once.
But the same applies the smaller Prepacs as far as price is concerned.
Hmmmm...looks like a lot of the Prepacs are on sale at Best Buy right now, so you may want to take a look.
Those look like what I need. Thanks for the tip!