Bags are highly personal and there are tons of them. But they are a very important piece of equipment. Here's my advice: go to a good pro store with a big selection of bags and have a look. Take your HVX and gear and see how it fits. I tried to cheap out once, but when you go cheap you just pay twice. I ended up with a black Porta Brace bag. They don't look like much, but they are really well designed and simple. There's a reason so many people use them.
I use a Kata 207 backpack. It's a great bag and holds plenty of "stuff." I don't use it that often... as I typically keep my camera, firestore and marshall monitor all rigged-up with a zacuto rig in my storm case. If I'm just running with the camera I revert to the Kata 207.
Jim