Low to moderate volume while dining doesn't really sound much like you need something for critical listening. So, I'm making suggestions based on that.... and that maybe you'll do a little bit of critical listening here and there.
I'd suggest a used Arcam Alpha, Diva, or even a model 10 integrated because it can power 4 speakers, has a remote, and is easy on the budget. These will all sound very good at low to moderate volume and have everything you want. Plus, they're nice looking and easy to use.
I'd also consider a NAD integrated for the dining/lounging system.
Also, see the other integrated amp threads here on AC for more ideas.
For speakers you have a million choices but so far I've enjoyed the Usher 718's for low volume listening more than most. They have a nice, rich tone that is very pleasing.