I'm with dim_span on this one; for under a tenner a month, I still believe the premium version is good value.
If you have time, you can compile play lists that can be accessed off-line.
I spent part of today checking the WHF thread, 'What are you listening to?' and then typing artistes into Spotify for a taster. Combining these two sources is such a rich vein of musical goodies. Long may it last!
I will, doubtless, spend money on CDs on the strength of this.