Did a search, but nothing too substantial really turned up...

I'm in the market for some Avid Juicy Fives (open to suggestions though @ approximately $250). This will be my first set of disc brakes...

I've been using V-Brakes but they just aren't cutting it anymore for the type of riding I'm doing. I'm not a downhill rider, but more of an XC/Freeride kinda guy. Even the riding that I'm doing now is pushing the limits of the V-Brakes I have, and I'm also planning to hit the local mountains in the spring (so I guess I will be doing a small bit of downhill). Also, I ride a Gary Fisher Cake 3, incase that matters to anyone

That said, I noticed that there are a few different sizes of rotors that you can get with the Juicy Fives - 160mm, 185mm, 203mm. I was originally just going to go with the smaller rotors. What are your thoughts on this? Does the larger rotor give you much more stopping power? I also weigh about 205 lbs., so I'm wondering if that would possibly factor in.

Thanks in advance for your advice and input...