So, I guess I was most *excited* to see Gamma Ray, who (in spite of the extended HMU) just rocked.
However, I'd give "best performance" either to Edguy, whose set was amazing, or to Symphony X from PP2. The reason for SyX is that I was not a huge fan of their music going into that performance, and that performance *made* me a fan. That's power, IMO.
Kyle