Im going to run the MarsHydro ts600 for the first round it seems pretty stable only hitting at 85 without the exhaust on.Personally I would give that temp test a 24hr run with your extraction fan on. You're going to be having that thing on 24/7 anyway, and it will lower your tent temps. I've run a smaller tent with more powerful lights than that and the same (assuming td-100x) extraction fan during the summer time in a closed bedroom with no AC and my temps were acceptable.
My larger light was hitting 90's within 2 hours i understand that that was without exhaust but its about to be summer in Texas and it get really hot here so i think its best maybe i run the larger light in winter time and the smaller during the summer.