I have a epl1 that I intend to convert into a diving camera, but I'm new to underwater photography. I'm planning on getting the pt-ep01 housing with 14-42 zoom gear, and the sea and sea 110a with sea arm vii compact. Is there anything else I'm missing? Is everything all compatible? The sea arm vii looks like it is discontinued, is there anything that might be better for future upgrades if i decide to add another strobe?