I just upgraded my 6 speaker system in my 2013 hatch. Everything from Crutchfield and installed by Geek Squad. Crutch is great, and evey week there is a new sale if you are on it's email list.
I didn't want to spend a fortune...chose Sound Ordinance (Crutch's house label) for 6.1/2 components, 6" coax Sound O in the rear, SO amp at 50 watt per 4 ch and SO 8" powered sub (fits under driver seat).
Spent about $500 on equip and $400 installation. Maybe you could find cheaper install, but I've previously dealt with this same Geeks, and totally satisfied.
If you favor the more "name" brands (Alpine, Infinity, Kicker) Crutch carries all, and I think the value that Crutch adds to the equation is unsurpassed.