Gary, the Army Pass, Langley, Miter basin trip will not disappoint. I did this route on my first Whitney trip a few years back. Langley is a worthy peak to scratch off your peak list, and the views are great. Lots of pretty lakes and campsites. You might even try some fishing. We had good luck. You'll also still be in the Portal/Lone Pine area so that urge to fulfill a burger and beer feast at trips end can be met.
John