My needs are virtually identical to yours, although I prefer a 17" screen. I use my laptop almost exactly the same except I use my touch pad. However, it can be disabled and I learned this by accidentally disabling it a couple of times.
Another vote for Toshiba. I replace mine every 3 years only because they are my primary tool for work. All my old ones still work, and that’s a pretty good testament to their quality. I don’t spend a lot of time making accommodations to software or hardware. Everything just works as it is supposed to.
Mine has an internal DVD, good speakers and is solidly built. I’m on the third year of this one and may stretch it another year because no glitches or problems whatsoever.
Good luck! Never an easy decision. I’ve had equally good luck purchasing mine through either Best Buy or direct from Toshiba.