Lastolite eazybox hotshoe kits

[PatrickMcCluskey]

I have been looking at these kits for a while and am undecided on whether to go for the
Lastolite Ezybox Hotshoe Kit 60cm x 60cm (24" x 24") or the
Lastolite Ezybox Hotshoe Kit 76cm x 76cm (30” x 30”)
anyone have any knowlege on these, I may also add an umbrella kit
again which one to choose

Lastolite All In One Umbrella Kit 100cm (40") or the
Lastolite All In One Umbrella Kit 80cm (34")

I will be using canon speedlites 580ex and 580ex mk11

I will also need recomendations for wireless trigger and receivers
I have heard the canon trigger needs a direct line between trigger and flash units
and feel this may be blocked by the softbox

I have also heard the canon trigger only fires up to to speedlites, is this true ?