There are no risks really, I find that a ps3 saves more money than buying an Xbox would.
For example...
Xbox controllers are 60 dollars with AA batteries, 30 bucks for rechargable, PS3 controllers are 55 WITH rechargeable batter built in.
PS3 is a Blu ray player, if you don't already have one, then you don't necessarily have to get another one.
To play online with the Xbox, you need to pay a subscription. If you have netflix, you need to have a Live sub to use it. Anyone else think this is stupid? I need a sub to use my sub? Incidentally, the PS3 requires no sub, but you can pay for PS+ which gives you special access to content and gives you discounts.
Although this isn't the case now, Xboxs used to require a wireless adapter that cost 100 bucks, while other consoles, including the wii, had it built in. Zuh? Seriously, my DS and PSP have Wifi.
Hard drives are available for both, but the PS3 simply uses any old Laptop Hard disk, meaning you can walk into a computer store and buy 500 gigs for 50 bucks and install it yourself, while the Microsoft sells specific xbox ones for 150 dollars that are 250 gigs.
Please note: the prices I'm using is based on the prices in Canada, just so some people don't assume I'm American and go batshit bonkers over wrong prices.