Taking into consideration that the bitcoin exchange rate is ridiculous I think I'd go with paypal.
But if it's for the sake buying illegal stuff in the deep end of the internet I'd stick with bitcoins.
The U.S. is going to be going after bitcoin. They already shut down Liberty Reserve and are charging six of the people who ran it for circumnavigating the United States Monetary System. Bitcoin is definitely next, no matter what country it's in the U.S. will barge in like the fascist regime it is and take it down.
never used bitcon, but pp is horrendous.. a rock would be better then pp
pp lets the buyer claimback and win 99.9% of the time regardless of what happends/what proof u give (and even higher win % if its intangables)