Accidental damage coverage is not a cash value replacement policy. It is coverage against the computer that you have, such that if you damaged it, you would get a comparable computer to replace it. It's not a protection for the money you spent but instead for the item you bought, which is now worth substantially less than you paid for it.
They determine depreciated value by specification, so whatever the cost of comparable specs is today, is what you'll get as a replacement system. They've got plenty of 17" Toshibas with similar specs in stock right now. If yours is junked out, you get a comparable IN SPECIFICATION system. And no, you can't tell them you "don't want a PC" since that's what you bought, that's what you get as a replacement.
A long time ago, it used to be possible to buy these policies and "trade up" at the end of the warranty period. However, they aren't stupid. You don't get to spend $2300 once and get a new computer every two years for eternity. Not the way it works anymore.
The short answer is, you can't turn water into gold and you can't turn a 2.0Ghz Qosimo into a 2.8ghz dual core 17" macbook pro. Although, while we're in fantasy land, I'd like a pony.