So, I got permission from the wifey for a new bike! Help me choose between these 4:

2017 sirrus base (triple crank, 8speed w/ altus components) for $350

2018 sirrus base (triple, 7speed w/ tourney) for $400

2017 sirrus disc (compact crank, hydrolic disc w/ alivio) for $550

2017 diverge for $650

I've pretty much decided on the 2017 sirrus base model. It has the triple crank the beefier 8speed rear and slightly nice components over the base 2018. It's matte black. It fits me. I like the feel of the flat bar. And it hurts my pocket book the least! Is it a good deal @$350? What will I be missing over a pricier model? Will I be limited by the flat bar? Should I look for something used instead? I live in a pretty hilly part of Ohio so I think the triple crank will be appreciated... But will I regret not getting disc brakes?

This will be my first new bike in a couple decades, and probably the last one i get for awhile. The last 10 years I've been riding an old steel frame dumpster salvage that i sandblasted, powdercoated and converted to single speed. It took me a few 'finds' before I got one that felt good but I finally settled on an old Fuji that fits me great... the problem is I moved away from Florida and encountered these strange things called HILLS and now the old single is practically unridable... hence my need for a new bike with gears. Help me decide?

Thanks for the help, Sirrus super friends!
FRED