I would look into the new Chrysler Pacifica. The "experts" are very impressed with it at the Auto shows.
My 2003 Chrysler Town and Country is still going strong, and still has the original trans. I just turned 200,000 miles about a week ago.
We do not want a separate router and modem. We also want it to be able to stream 4k video in the future. What specs should we look for?
This will be used with TWC(EarthLink) broadband internet. The link below lists their approved modem/router combo units...
I don't know about the current receivers, but I have had a cheap Marantz stereo receiver in my unheated garage for about 20 years with no problems. And I'm sure the winters here are even colder than by you.
Art at Projectorreviews.com just posted his review of the Benq W4050. He liked it very much.
And Projectorcentral.com posted their review of the Benq 2050 and 3050.
It comes down to the features you need and your budget, of course,
Josh makes a good point about experimenting for screen size. Also, when there are 2 or more rows of seating, you have to compromise on screen size. I would choose screen size based on where YOU will sit.