For your filtration.. I can say that U need a much better one than emperor.. maybe get fluval fx5 or other canister filter that is rated for 200 gal
. and up.
I think tangs are too big for your tank... I have a 75 gal
myself and people told me that I should get rid of 'em.. so I did.
U should be fine with 100 lbs of LR
but 150 is safest. and just add raw shrimp for cycle, then get cured or uncured LR
.. I believe that this is the best method.
I think since u are a newbie u should go with FOWLR
first.. then when u get comfortable enough, you can switch to reef..
I have seaclone 150 and I think It does alright. I got another skimmer just to help it a lil more.
I dont think u need air pump with your waterflow.
I know I didn't cover all but HTH