I can't speak for the Ithaka but I do own an Aqua , I really love the vape off of it but it's only draw back is the juice capacity . It's not the easiest to rebuild because there are no post holes which would make it easier when building your duals but once you're used to it it's fine. The Fogger is very much like the Aqua and holds a lot more juice so if capacity is a factor I'd look at the Fogger as well.
PS...building duals in a Kayfun gives a really nice vape especially when you've drilled out the air hole.