Buy, buy, buy, definitely
I may download a few songs but will buy the album.
I mean I always use the net to search songs, but it is more to discover new stuff.
For me gnutella or Kazaa have always been opportunities to discover new styles or band. Once I like, I go to buy the album.
On the other hand, I don't mind donwloading the Beatles or Michael Jackson, they can perfectly live without my money, but I want my favorites bands such as Anathema or Antimatter to be able to make new albums! So let's give em money