I wouldn't buy the Aquatic Life fixture with the G12 MHs. Too limited on bulb choice...like pretty much no choice. Boo on that. And HID T5s?? Give me a break! That's like saying I drive an Astin Martin Cavalier.
My tank goes no higher than 80 degrees, and down to 78 at night. I keep my central air set to 78 degrees during the day, and open all the windows at night to cool the house down as much as possible. I have 2x250w DE MH and 2x39w T5s over a 90.
I'm not a fan of chillers. They are great for the fish, but they heat the crap out of the room they are in. It is like running an AC unit with it venting into your bedroom. It makes the room hot and stuffy. I avoid chillers at all cost, but the central air doesn't cost much. To me it's worth it, plus I have a large dog that stays inside all day, and she wouldn't be able to handle it if there was no AC.