Get a Ps3 ofcourse.
How else are you going to play;
God of war
Metal Gear Solid
Killzone2 and 3 (Best console shooter ever made)
Resistance Fall of Men (not my type of games)
Ratchet and clank serie
The last Guardian+ remake of ICO and Shadow of the Colossus
Socom (not for me)
PSN games like Fat Princess
and I can go on with other titels that don't interest me, but have a huge fanbase.
And whoever said that if you don't already have a blue ray player, that you probably won't need it anyways? That's very wrong, that just means you don't know yet how awesome it actually is.
Please don't come with wank xbox exclusives, Halo hasn't been special after the first one, and go check out some videos for the new Halo, compare it to Killzone3 and then slaughter your dog for not having a ps3 yet.
Edit: And LittleBigPlanet is alot of fun if you have friends over! Maybe that's something you havn't experienced yet )