Tim, my first bike was a hybrid(Giant CRS Alliance) and weighs in at 22lbs, I bought this thinking it would be a beast for all conditions. As it's a sporty hybrid it came with a sporty looking wheelset. The rims have a 14mm inner width thus limiting them to about a 700x28-32mm tyre max. They also have a spoke count of 28 rear and 24 front. I got this online and paid a local bike mechanic to show me how to set it up and check it over properly. He runs a mobile repair outfit and also teaches MTBing. When I asked him what it would be suitable for he reckoned the lightest off road/ light trails only. He didn't recommend hopping on/off kerbs and didn't rate it for any strenuous use. It functions well as a relaxed road bike and that's about it.
If you want an all rounder, with 700c wheels, then I'd look at cross bikes, 29ers or a tourer. The least versatile off road would be the tourer so, personally, I'd go cross or 29er. If you want lightweight then it costs or you need to go secondhand. Tell us exactly how you envisage using the bike and we'll try and work out what best fits.