It really depends on which game genre you enjoy the most. That aside, the Playstation 3 is a better buy. Although currently overpriced, its value will show itself in 18-24 months. As a 360 owner, I must say that I do love the system. It however, does not have as much of a futureproof foundation like that of the PS3. The 360 is more than I need as is the PS3. Truly, let us know your preferences.
On another note, Blu-Ray IS a big deal. Go to your local eletronics retailer and have them put in the DVD vs Blu-Ray comparison video. The results are awakening. Also, if you have an HDTV, HDMI cables are available for $6 on sites like monoprice.com and other areas.
I have stong opinions. Slanted they may be. Uninformed they are not