What kind of sound are you looking for? What kind of bands are in your genre. That would help determine.
Like Matt said, the VK is a great beginners amp. Hands down go with the 6505 before the VK. The VK is good for what it is, but eventually you will want to upgrade. If you have the means to get something that will last for awhile, you do so. I believe the 6505 will last you longer than the VK.
That said, I wouldn't narrow your search to just PEavey. Once again, depending on your perception of punk, there are so many options out there.
VOX AC15 - Night train
Marshall - DSL - 800 - 900
Jet CIty
Blackheart
Randall
Mesa