I think you might do ok with 60lb of lr
. Might be crowded but it all depends on the look your going for and livestock you plan on keeping.
Agreed that the lion fish will have to go if you plan on keeping inverts. All other livestock will do just fine.
Another option would be to switch the canister filter to a hob
filter like an emperor or other. That is how I had my 80g reef set up.
Other than the filter and the lion fish you seem to be reef ready.
You will want to supplement the flow with probably 2- koralia 550 or 2- mj 1200. From personal experience the koralias give you a good wide flow.
Sounds good. Pics would be great.