Right now I am using a canon hg20 AVCHD and export to HD 264, not sure if that's what you were asking, but I will do some research
I give a strong second for Harm's articles in the Hardware forum. He covers all bases, and explains what one gets back from each investment.
In very general terms, I'd suggest an i7 processor, and if you go to a 64-bit OS, then as much RAM as you can afford and fit into the MoBo. Beyond that, a 3x SATA physical (no partitions!) HDD setup would be the minimum.
If you go to the top of the Hardware form and click on the Overview tab, there appears a drop down box with a number of articles that are worth reading.
This one in particular: Adobe Forums: What PC to build?
Your budget is way too low and it may be better for you to get a different camera, because this camera entails you need more than a budget PC.