For me it's not about supporting Sony because of price. It's about supporting a platform that is dedicated to gamers, that understands variety and that pushes creativity in all genres, understands art styles, invests in first party development, supports its systems for a long time and respects consumers the best they can.
I know i can't go wrong with a PS4, it has a lot of games, it has the best first party developers in the world, it has a controller that i really like, it has the Japanese support, it has a history of supporting its systems long after they release unlike MS who seems to no give that much shit about their system after 3-4 years and pumps up only the ones that sell... *cough* Gears, *cough* Halo, *cough* Fable, *cough* Forza...
Giving my money all to MS would be encouraging a company to make a console with shooters and western games as it's main genre, paywalls, a camera that i don't care about much and dlc exclusives... i've had enough of that shit this gen, i want something different, PS4 is that console to me.