I use a
Lowepro Slingshot 100 AW for carrying my kit around normally. I like quick access to it all, and I don't carry that much.
When I travel, I pack the Slingshot in the case with clothes to bulk it out, and carry the camera + laptop + hand luggage in a
Lowepro CompuDayPack. Both bags are great. I rarely carry my tripod or monopod, but when I do I just tend to carry it freehand.
I'd highly recommend the Slingshot. It gives you quick easy access to a SLR, and you can use it to lean on slightly when taking shots (leaving it around your front mid-section). I usually carry my Canon 400D & 70-300mm lens in the main compartment, and my pocket Point-&-Shoot camera in the front pouch, leaving room for sunglasses and other day stuff in the top pouch.
I'm guessing from the responses on here that Lowepro tend to be a very popular choice.
Update: Just re-read your post. That Slingshot case you're looking at is the same as what I've got. I'd HIGHLY recommend them. I was skeptical before purchasing one, but now I'd never go back. I know quite a few other guys who use them too. ----------------
Photogallery----------------
Now playing:
FictionJunction featuring YUUKA - Akatsuki no Kuruma ~Acoustic Versionvia
FoxyTunes