Nice laptop mate..extended warranty only for people who got their laptop broken so often, IMO. you could try your laptop with it's current warranty, or you can try to look if L655 has so many problems, and many people encounter problems, whatever the problem is. if so, and you get a major problem (such as LCD or worse) then you might consider extended warranty. however yours is toshiba and that's good. never heard lots of people complaining about their toshiba.
but, from my personal opinion, the guys here are right, if you get a major problem then you should sell your laptop and get new one.
Setting aside the cost/benefit/risk considerations for a moment, I've heard some real horror stories from people who did buy Best Buy extended warranties and were later very unhappy with the service provided.
If you do not buy the warranty you leave your options open for who does any repairs that may be needed, if ever.
As a general rule I avoid extended warranties. I did buy one for the MacBook Pro on which I'm typing, and it paid off on two occasions with a new battery and a replacement motherboard. Add to that the superb service provided by Apple and it was money well spent. Of course the ratio of purchase cost to warranty cost was much higher than 2 to 1 as in your case.
If I think I can buy a replacement anytime without worrying about the cost, then I skip the extended warranty.
I would definitely not get a 2yr warranty which is half the price of the laptop. There is always a 6month to 1 yr warranty every time you buy an electronic gadget or device. Besides, it also depends on how you take extra care with your laptop. If the product itself has a defect, you would know right away after a few days or weeks of using it, and you can have it replaced (but not likely to happen with Toshiba which is a very good brand).