Greg,
Your getting into Elvis at a very opportune time with all the reissues and twofer's with extra tracks that are on the market now. I'm jealous, most of my Elvis is on vinyl and you wouldn't believe how many 45's and 12 inch singles I had to track down to get those extra tracks that are now widely available. That being said My Aim Is True, This Years Model, Armed Forces, and Get Happy are always mentioned, but for very good reason. You can't go wrong here.
Kudo's to you on Blood and Chocolate and King Of America. Two very fine albums from a comeback year of sorts for Elvis. Don't forget about Trust, Imperial Bedroom, and Almost Blue (Elvis Does Country).
P.S. Check out The Coward Brothers