I have both a Dell Latitue C600 and a Toshiba M400 notebook. None of them have given me any problems, except the expected replacement of batteries, adding maximum RAM, and swapped out the Hard drives, due to, space.
I have a Toshiba and a Dell. Toshiba gets too hot to handle, whereas my Dell Studio 1535 remain ON 24x7 hours for months. Considering the extreme climate of Delhi, too hot in summers, too humid in monsoon, dust in the air all the time and Dell handling it well, I will recommend to go with Dell.
Don't buy Toshiba. I have their laptop Toshiba Satellite but it sucks big time. It started to give me issues in very first year of purchase like it would hang up when AC power was plugged. I got it fixed but it happened again after few months. Then I bought Dell Inspiron 15R Core i5 and its pretty awesome. Almost 1 year and no problems as of yet. You should go with dell.
I work with latops day in and out, basicly get anything but a compaq.
getting a replacement charger for some dells you will have to use a genuine dell charger as 3rd party chargers will not charge the battery eg I-go, coolermaster, bti
If your budget is under 1k, I would look at a XPS or a HP Pavilion, both can be spec'd out for your price range and even double the power your looking to get, I would spend the extra cash for a quality laptop.
I am also in the favor of purchasing Dell laptops because this not only fulfill your requirements but also helps you solve many other problems related with the laptop in future. Recently I have also purchased Dell and I am fully satisfied with its performance.
I've only heard bad things about Toshiba and very few people seam to own one, but Dell on the other hand, almost every other person has one, if they don't have an apple computer they have a Dell one, I don't know whether it's quality or if there was a big sale, but I just see that computer everywhere, like when I look back in class almost every student has a Dell computer.. I myself don't have one tho..:/