Not a bad idea, but that costs 5 turning attempts. Even with taking the Extra Turning feat, it'll be hard to use it more than twice a day.
That said, three feats (Quicken Spell, Divine Metamagic, Extra Turning) to be able to quicken two spells per day at no extra cost, compared to seven feats (Quicken Spell, Sudden Empower, Sudden Extend, Sudden Maximize, Sudden Silent, Sudden Still, Sudden Quicken) to be able to quicken one spell per day at no extra cost -- it's easy to see which is the best choice!