Hopefully the best thing out there for hydration on the run

Im a Florida runner training for a fall marathon. As my long runs got longer I needed to get hydrated mid-run. I could either ask my wonderful wife to get up early and meet me with cups of water or invest in a hydration pack. My sweet wife loves her sleep so she encouraged me to look into the latter option. After doing some internet research and reading some reviews I decided to go with the Camelbak Flashflo. I had heard of Camelbak in the past from my cycling buddies and Camelbak's website listed the Flashflo as the recommended hydration pack so I forked over the money and hoped for the best. Im 5'11" with a 32" waist (may be useful to know) and am planning to run a sub 3 hour marathon. This means that most of my runs are done at 7 minute pace. I hoped that this pack wouldnt wiggle or jiggle too much. The Florida heat also has a way of increasing the chafe factor exponentially so I hoped that this pack wouldnt cause me any discomfort during and after my run.
I filled the reservoir (easy) strapped the pack on (somewhat easy) and tightened down the straps. I like the side straps that allow you to pull the pack closer to your body, but didnt like the way the harness system fit around my waist. I expected to wear the pack like a belt, but it kept riding up my waist and settling below my belly button. I was able to tighten the pack down, but it came at the mercy of my belly expanding. I also felt a bit like a flag football player with all of the straps hanging down from my waist. The jiggle was minimal but noticeable, and prior to my run I had to wear the pack over my shirt to help the fit and minimize the chafe. Unfortunately, the locals disapproved of my fashion statement and wondered why I was so out of touch with fashion. More importantly, I couldnt easily remove my shirt toward the end of the run.
My other issue was with the tube used to feed me the water. I believe its supposed to wrap around the front of your waist and attach to two clips on the pack. When I had the tube pulled snugly across the front of the pack I kept getting tapped in the hind quarters. I didnt feel like a horse with a left handed jockey, but I didnt really appreciate this nagging reminder that I had this water pack on. If I let the tub out too much then I received a continual low blow to the nether region-again, not painful, just annoying.
I will say it was quite easy to use the bite valve and tube to get my fluid. It was at least as easy as drinking from a cup. You have to be a bit dexterous to get the tube back in the clip and then let the slack out or in enough to limit the above mentioned whipping or low blow. I would have appreciated another clip by the bite valve that I could attach to my shirt collar or should sleeve to make the water more accessible. I also felt a little like the caterpillar in Alice in Wonderland as I drank from the tube (and this thought made me realize that I was getting a bit delusional). There was a few times where I would try to tighten down the straps as I took in more water. I was able to momentarily pull the pack down to my hips, but then the pack would ride back up around my stomach again.
After my run I realized that the pack didnt chafe me in the least, probably thanks to the shirt and my trusty runner's lube, but I was pleased that the pack didnt damage me. I was also surprised to see that I almost drank the liquid equivalent of Billy Dee's Williams favorite beverage (It works every time) and that it probably improved my recovery time and reduced my post run need for water. Since then, Ive taken the pack on an 8 mile run, then a 16 mile run. I ended up just dropping the pack half way through the 16 miler. I guess I just cant get comfortable with the slight jiggle and slosh of the water as well as the position of the pack on my stomach. I plan on returning the pack to see how the backpack style packs works out for me. Maybe the pack was made for someone with a slightly wider waist-or I just wasnt using the pack correctly.