I've built multiple computers for multiple clients over the years so here's what I would suggest for what you use a computer for.
Robot Check
That laptop has the basics of what I would go for. There's an upgraded version that has a bigger hard drive. If all you do is read email, look around some forums and stream some tv, this will do everything you need.
If you want something a bit faster and more meaty, this is a good choice:
Robot Check
If you're going to be streaming tv, make sure you have a good router and internet package in the house. If you would like to more detailed help, feel free to Direct Message me and I'll help you find something that will fit your needs.
You really don't need more than 8gigs of ram. My wife and I are hardcore gamers and we self-built our systems. Her's has 16gigs of ram and she's running all the modern games on Ultra quality. You're not doing anything even remotely comlex, so don't blow a bunch of money on something that will be overkill.