I have read alot of posted on the best setup and for the best setup for me I was thinking E55 (top), and for the sides a E45 and E36. I have seen this setup in pictures and the bike looks very symmetrical and give the best use of space instead of going with two 36L.
I will be slowly buying everything so my wife don't have a heart ache so I wanted to get the E55 now so I can get rid of the backpack. But from what I am reading there is a weight limit. I wanted to use this to carry a 13 inch laptop, work shoes, clothes, lunch and rain gear (maybe keep it all in the backpack and just pull it out.) At work I would store my jacket and helmet.
Other uses would be to pick up a few things at the store, light shopping so I could leave the cage at home. ANd when riding with my wife (her bike has no storage right not) we could put the helmet in the Givi an walk around.
Will this case do what I want it too? Around the area I hit 70 max but don't need to loss the case with my work computer in it.
Also I am slowing getting her use to the idea of long trips so in the future (later this year) I wanted to do a few over nighters and the top case would come in handy. Next year would be trips to FL and or NY so I would be getting the side cases then.
Let me know what you put in yours, I would hate to fork over the money and then end up not using the case because it won't suit my needs.