Just this spring I crossed Cho La for the third time from Khumbu side. More easy than other way around. Only late in the year ice can make the tour quite heavy (crampons or iceaxe!). Kong Ma la is the best approciable from Dingboche or Chuckung, it's a long walk and if there is any snow .....can be dangerous too. Renjo La, easiest way from Gokyo side. From there you have a splendid view on Makalu, Everest and Lhotse. Might say even better view as from the Gokyo Ri and more relaxed, no people around you.