looking for info for new setup please

[fishguyxd]

Hi I have been to big Als ,fam pet in sherwood ,a wholesale place?? by the mayfield and other pet stores petsmart,petset,pet paradise in st albert Ok I have narrowed it down to getting a 75 gal aquarium and stand.why I like that size for length andwidth, ht. I have looked at lots of tanks from a brand called all-glass to Oceanic brand to the others@ big al's and listed stores I have looked at some protein skimmers 2 different sumps and briefly viewed some powerheads ,heaters etc Now I am looking for some experienced advice (the aquarium will house LR and fish at first and some corals,etc in the future). Is this a good size tank should it have an overflow built in,are any of these tanks or equipement I should stay away from or really need ,is a skimmer required where do i set up all this equipment in a sump area on all in tank or could i use a cannister filter (i been told yes but long term stay with a sump How big of sump do i need and powerheads and what kind work the best. whos should i buy all the sand and LR from or fish etc,etc. anysuggestions please and thanks