Skimmers are not(should not) be the cheapest part of a good marine system.
If you think you may go sump then look into that first IMO
so you can have greater choice of protein skiimers and be able to hide it.
Reef octopus and CPR both make good overflows that incorporate a toms aqualifter to aid in continuous /successful syphoning without fail.
Mostly hoping a vet will chime in to help you though!
I'm all sump and own 3 different kinds of skimmers.