Mmm,…this is a great thread that most likely many of us can relate. I myself have purchased professional level gear over the past year,….makes me sit back and think if this is practical….but we all enjoy our profession/hobby. Just my 2 cents,…my opinion,….sell everything except the 5D III. Keep the 5D III, it’s a great camera and will serve you well for many years. Next, save the cash and get a 50 f 1.4 and use this exclusively for maybe 6-12 months just as a photography exercise. Re-evaluate in year and see what direction to go….