I have a low nutrient SPS dominant, and my zoa's are doing fantastic. There is absolutely no reason you can not have both in a low nutrient tank.
To give you an idea, I recieved a Purple Hornet polyp about 2 months ago, and there are now 4 and a bud. These are supposedly very slow growers, but seem to be doing very well. My other zoa's and paly's are doing equally well, but growing faster.
Most SPS will not do well with anything over about 5-10 nitrates. They may live, but will not thrive, and will likely brown out. Lighting and flow are as important, so this is something to keep in mind.
Chaeto, Mangroves, macro, good skimmer, carbon dosing, algae turf scrubbers, water changes, etc. There are many ways to get your nutrients down.