The barley world has moved on from Klages. Harrington is very much on the way out. Metcalfe is fairly popular these days. My latest bag of Rahr 2-row Standard was blended from '17 Pinnacle 50%, '17 Copeland 50%. The Rahr Pale Ale was a blend of '16 Copeland 25%, '17 Copeland 25%, '16 Metcalfe 30%, '17 Synergy 20%.
A few maltsters are using 100% Genie, which I feel is a wonderful barley. Ask your shop for a malt analysis. It will have the blend used to make the malt.
Personally, I do not care for Great Western. Of the bigger national brands, I prefer Rahr. Then Briess. Look for locally grown and malted, if quality matters above cost. We are lucky in Colorado to have Colorado Malting Co. and Root Shoot Malting growing and malting very high grade barley. All of their malts are single variety barley.