Problem: I have to fly from Ohio to JNB. I can take AA/BA through LHR or NW/KLM through AMS. AA gives my 150% EQM while NW only gives 100%. AA is about $1,500 more expensive.

How does the seating compare? I can pay an additional $4,000 and get NW/KLM biz class. Is it "worth it"? I am 6'4.