Chillers are great, set it and forget it....
Not cheap though, if you decide to get one make sure to check the reviews before handing over your $. I got mine at "the giant fish" last month. I was at work when mine quit and arrived home to a hot tank. Added all the fans I could find and put ice from my freezer in the sump. Got to about 81 and then the search began for a new one.. 4 hours later, I settled on one and the store above had the best deal and they threw in the install kit for free. Hose and clamps provided, none of which I had on hand. Was here in 2 days and it uses 60% of the energy of the old one. Plus it is very quiet, I can't hear it come on while the old one would wake me up. It will still take years to recoup the cost but with all the money I have invested in my tank it was worth it. It also depends on where you live if you really need one or not. Before you purchase one try adding a fan on top of the tank and see if that helps, most likely it will to some extent.
Good luck, spend wisely my friend!
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110 Gallon FOWLR, 25 Gallon sump/refugium.