Well, you're a 58. That's pretty close to what I have in size.
I take it you're live rock and sand.
I'd advise against a wet/dry. Many can be converted to a sump. My reasoning is that the wet/drys can easily dump nitrate back into your system as well as take it out: live rock and sand don't do that. That means the system has fewer nitrate moments, which means the fish get less irritation and the corals do well. Irritated skin is no help if there's been ich around. You might query about that wet-dry item in the equipment forum, and I know you'll get some discussion there.
On the fish matter, however: you've just had a nasty experience with ich and qt. First of all, and I know you must be pretty experienced at this: but scrub that qt tank. I'm not quite sure white vinegar will do it, but it would be a start. You can also use weak Chlorox and rinse in fresh water until the chlorine smell is totally gone. That's sure to get any living tissue, including ich.
I have two cautions in your fish list: one, ocellaris are a little ich prone themselves. But if you want clowns, that's a good one. Second, Engineer gobies I believe get some size on them when they grow up, and they can move rock. But they're neat creatures.
One thing you might consider is a tank with mostly blennies, gobies and dartfish, which are about the most ich-resistent lot you can come up with. They won't go in with the angler or octopus, however.
Lunch.
Is that your angler, the avatar? That's one neat fish.
