Sudden Metamagics

[Ixahinon]

Scenario:

Human Mage took Sudden Empower and Sudden Maximize as a feat. He can only use the metamagics 1/Day, but he can basically Empower and Maximize a Fireball, and still keep it third level while taking the 'normal' feats would require him to bump that spell 9th level.

Problem:

Is a Sudden Empowered, Sudden Maximized Fireball treated as a 9th level spell for the effects of dispelling, or a 3rd level spell. I'm assuming 3rd level spell, as it is not actually taking higher spell slots, and any other way would be incredably powerful, even for mage standards.

Edit: Hmm..now that I think about it, I don't think fireball can be dispelled, if I recall correctly. It's an instantanous effect. In that case, subistute the fireball spell for some spell that can be dispelled.