In the battle of mid-range golf discs there are really only two choices aren't there? Buzzz or Roc. These two discs have been the subject of high-charged discussion on message boards all over the internet. Yankees/Sox, Duke/UNC, Michigan/OSU...now Roc/Buzzz. I personally have thrown and do throw both because they fit different niches in my bag. However, I am in the minority on this one. Choose your side...
Innova Roc - A versatile mid-range with a predictable fade. The Roc is legenadary for its versatility. It's great in headwinds, short drives, and mid-range shots. It beats in really well and eventually turns into a slower, more understable mid-range.
Discraft Buzz - Discraft's flagship disc, often referred to as "The best disc in the world". When I was first learning to throw the Buzzz was my savior. Predictable, straight, versatile (until the wife threw it in a gator-infested river!). I usually carry a few in various beat-in stages. The buzzz is world-famous for dependably straight mid-range shots and almost no fade (especially in the pro-d plastic).
a few other contenders...just for fun
Discraft Comet - A straighter flier you will not find. The Comet will hold any line you give it for as long as you want it to. Lesser known than the Buzzz or Roc, but I'm not sure why.
Discraft Wasp - Similar to the Roc in my opinion. The Wasp is just overstable enough to hold a special place in my bag, but still useful in many situations. The wasp is my mid-range of choice in windy situations.
Innova Stingray - I stumbled across my first stingray in the woods. It had no name on it, so I put it in my bag. The rest is history. It's a great roller and understable mid-range. You can't top a beat in stingray as an understable mid-range golf disc.