30"x30" will be hard to cover with either of those lights without dead spots IMHO. I've got a 150W hqi light that I'll be using for a nano cube I'm planning, and when I turn it on, it doesn't spread well for anything larger than 18x18", really. I'll probably be building the tank 18x18x18" accordingly. And that's with a DIY shoplight pendant, which advanced aquarist rated as the best 150W reflector for an area around 2'x2'.
advanced aquarist has some good reviews of reflectors you could peruse through. I like delphinus's over the tank hangman brace idea. it could allow you to hang a pendant without putting holes in your ceiling.
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Everything I put in my tank is fully dependant on me.
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