The PS3 always interested me more than a 360 as its existing and upcoming exclusives are more to my taste (e.g. Last Guardian, Heavy Rain, Valkyria Chronicles, Uncharted series, Ratchet & Clank, GT5, LBP).
300 € would the price where I couldn't resist anymore, but the price was never a real obstacle to me anyway.
The obstacles to me are
- I don't own an HDTV and at the moment I would not buy one just for HD gaming
- missing BC (I never owned a PS2 and I would want to have the possibility to play games like SoTC on the PS3)