Not to sound like a "fill in the blank" but check the discussions about "new bag". You'll find a few different discussions that pretty much have it covered a few times over. There's alot of info in there too.
I've replied to many of these similar post. So I'll keep it simple. I've owned or still own the following bags. Revolution, Gorilla Boys, Phenix, Innova and Latitude 64. Since I've only owned the Lat. 64 bag for one season. I can't say how it will hold up over time, but I see no signs of wear and the quality of the bag is on par with Revolution IMO. So for me the Lat. 64 is the best disigned bag for me. 3 huge compartments and plenty of room for discs. The set up is ideal for ME. I say this because it has no rain cover (I don't do rain) and it only has one bottle holder, but there is an outside pouch that's big enough for a second drink. The other bags have good and bad things as well, but the negs of the Lat 64 were things I could live with better than the other bags.
Fade Gear Tourney Bag. Great bag. I've had mine for about 3 months now. It has plenty of room for discs, towels (it has a clip, but I carry two), and other related gear. I have the Garden Deli version (just like HallieG). Very affordable and great features.
I own the Innova tournament bag and the lat 64 pro bag. I reallt love the lat 64 bag because of it's three big pockets and the umbrella holder. I use it when I need to carry an extra sweater or a jacket or an umbrella since it has the holder for the umbrella and the lid on the top is padded so that it gives you a softer touch on your back if it's folded back. it has only one bottle holder though so i use my two bags on different occations. If it's rainy or cloudy and it might get chilly I use the lat 64 bag cause i can bring an umbrella and a jacket if it starts to rain. I use the innova bag if it's sunny and no chance of rain since it can carry more water and i don't ned big compartments for sweaters/jackets. the cons of the lat 64 bag is that it's slightly heavier and that the fact that it only holds one bottle makes the total weight of it unbalanced so that it's heavier on one side. also I dont really like the deviders they come with. i often put the innova dividers into the lat 64 bag cause then it can hold more discs...
Latitude 64, It easily holds 14 discs with the divider that it comes with, but with a few of the velcro dividers in it it can easily hold 30. With tons of room for all the extras. Shirts, towels, water, it has storage for just about anything.
Try using the outer pocket next to the bottle holder. It big enough to fit another water bottle. For counter ballance I just put all my personel stuff in the sub pouch next to the putter. Ya, I also put my Innova soft divider in instead of the standard one. I love the bag.