Should i upgrade from gtx550ti to 560ti?

I have a new computer ive had it a week. It has the gtx550ti graphics card in it but now ive seen the fun in pc gaming im wondering whether to upgrade to the 560ti. Ive seen a deal to get it for £160 including 3 good games and i reckon i could ebay mine for about £80. So is it worth it? Thanks|||The video card you have should serve you about a year from now, because the games that are coming out right now does not want that high quaility video card, i am even sure that you can play BF3 without any lagging, so you can wait about a year, plus the video card you are requiring will be cheaper after a year from now.|||Definitely, as long as you can sell the old one. It's a pretty giant step up from the 550 Ti to the 560 Ti, and the 560 Ti should last you for a long time.