Honestly please wait on the fish. Youre in mid cycle I would think if you have nitrites in your tank. You need to have 0 trites and not just by doing pwc
's. When you do a water change youre exporting out NITRATES not trites.
Also, sorry but no tang. They require the 6 foot tank not a 4 footer. I'm waiting on my 125g upgrade to get my tangs.
I think your list otherwise is great, I have the exact fish almost. lol
Are you gonna have corals? I believe anglefish aren't reef safe...someone will; chime in...