Which case are you referencing? The shapeless microfibre one for the first iPad? The Smart Case for the 2/3/4? There's quite a few options, but it depends on what you prefer.
I'm split between the Joy Factory Smartsuit Mini (thick cover, good hand feel due to the cloth, but heavy), the Speck SmartShell with the Smart Cover (minimalistic, removable cover, but slippery), or the Moshi VersaCover (I hate the microfibre front for how easily it stains, but it's very thin, covers most of the iPad, has great stand functionality and hand feel).
Of the three, the VersaCover is the best balanced in terms of weight versus protection, IMO. I like the look of the SmartSuit, but like being able to remove the Smart Cover while using the SmartShell (even if it's one more piece to lose). Given you already have a Smart Cover, you won't lose anything (besides $20-30) if you get a SmartShell or the SwitchEasy CoverBuddy. The SmartShell and Versacover do have the magnet functionality to help keep the cover out if the way.