I do not see enough information to interpret the panic. Setting up a serial port capture of the panic is the best way to get the whole panic. I actually built a serial port logger using an open log from sparkfun along with some other components. Another PC and a serial cable also works so.
I have rarely seen a panic caused by a bug. Common causes:
1. Bad ram ( most common, even ECC ram can go bad )
2. Firmware bugs in hardware ( I've had bugs in WD RE-3 disks cause panics )
3. Faulty CPU ( just had to RMA a faulty $2k Intel CPU )
4. Faulty hardware ( power supply, network cards, RAID cards, etc. )