Some of the equipment at the link you pasted is backcountry equipment. Some of it is lighter duty touring gear. Lifer's description is spot on. Backcountry gear sounds ideal for what you do. It's great for going through the woods on unmaintained trails, will give you more confidence descending hills, and, unless you're racing, is not much of a detriment in a groomed/tracked area (unless you get a really wide ski).
The specific differences between touring and backcountry gear:
Boots: A little stiffer and warmer than regular touring boots. Much more lateral stability to control the ski. Within the backcountry category, there are variations, just like there are variations within categories of downhill equipment. Some are really heavy duty, some aren't much beefier than a touring boot.
Bindings: These look essentially the same as their lighter touring/racing cousins, but are just a bit more solid. The predominant touring binding type is called NNN (new nordic norm). The backcountry version of it is usually called NNN BC. It looks pretty much the same, but is a little more solid, and has better guides on the top of the ski to fit into the groove of the boot. Though they are similar, NNN is not compatible with NNN BC. The Rotefella NNN BC is probably the most common. They also still make 3-pin bindings, which also are reliable and work well, though not as common in most backcountry equipment now. I skied on a 3-pin for many years, until last season. There are more boots available for NNN now. The 3-pin boots tend to be more tele focused and heavier.
Skis: Essentially the same as touring, but generally slightly wider and often with a full or partial metal edge. I'm cheap and have been skiing on the same heavy metal edge ski for around 20 years. I prefer waxable XC skis, since I feel it gives you a better kick and much better glide. I often glide much faster on my clunkers in a groomed area than friends on rental no-wax (scalloped/fish scale) gear. You just want a ski that's wide enough, and perhaps with a metal edge/sidecut to give you more confidence on hills. The manufacturers have started making shorter, stiffer skis, that are easier to control. Be attentive to the weight/size recommendation on the ski. It is really important, so you flatten the camber just right to grip and glide. http://www.akers-ski.com/Merchant2/merchant.mv?Screen=CTGY&Store_Code=ASI&Category_Code=bcskis
I've had good luck with mail order from Akers Ski based in Maine, though there are other good dealers whose names I can't remember now. Akers knows their stuff and can help you pick something out appropriate.