I have to go with City To City by Gerry Rafferty.
Some other great ones
Infinity -Journey
Van Halen's debut
You Can Tune A Piano but You Can't Tuna Fish-REO Speedwagon
Double Vision-Foreigner
Don't Look Back-Boston
Who Are You-The Who
Pieces Of Eight-Styx
The Cars debut
Molly Hatchet's debut
Hot Streets -Chicago
Dire Straits debut
Toto-Toto
Yes a great year for music