I think this is an 'it depends' answer. I had looked at armour one time. One thing I found was that, in some cases, temperature differentials between the silicon and body materials could result in condensation between the two. YMMV. But here's a couple more thoughts.
Think long and hard about hanging 2 pounds around your neck all day, especially in the hot Florida sun. I've tried this once or twice and, even with a
Zing or
OpTech strap, it can be a big pain after a few hours.
What I currently use is a
Hoodman screen cover. It actually fits on the body as a part of it and provides a hard plastic protection to the back side. And doubles as a shade when flipped up in bright sunlight. Unless you chimp a lot, these things are great.
In tandem, I've got a Zing foam cover. Same as the old everyready-type leather cases they used to make just for the camera. For short jaunts and no lens changes, this is a great combo - as long as you have a decent neoprene strap. That material evenly distributes weight much better than the average strap.
But a bag, even a small one, can be nice. For what you're talking, I'd suggest either a small toploader or small beltpack from
LowePro. Can be worn from the shoulder or around the waist. Definitely find one with 'AW' on the end. Those come with a very thing but effective all-weather waterproof wrap tucked inside the bag that folds out and covers the whole case in 5 seconds.