I streamlined my kit since getting my 5D Mk III in order to do the body justice, part-exing some Sigma and non L Canon glass on the way.
I'm now down to Canon 8-15mm L, 17-40mm L, 24-105mm L, 100-400mm L, 85mm f1.8 and a Tamron 90mm Macro Di.
Future buys will probably be limited to a Canon...