Senseless violence you say?
I'd go for the XBox 360 for game like Halo 3, Mass Effect, Call of Duty 4: Modern Warfare, BioShock, The Orange Box...I could go on forever. The PS3 also has great shooters but the 360 has more of a variety.
As for Blu-Ray and HD, Blu-Ray is a notch above HD and is built in with the PS3. Both HD and Blu-Ray will look fantastic on an HDTV.
Hope that helps you out a bit.